question: Michael Trevino is known for his role as Tyler Lockwood in an American supernatural drama series developed by Kevin Silliamson and Julie Plec, that aired how many episodes?
answer: 171
context: Title: I Was Feeling Epic
  Passage: "I Was Feeling Epic" is the series finale of The CW television series "The Vampire Diaries", as well as the 16th and last episode of season 8.  It is also the 171st episode overall.  It originally aired on Friday, March 10, 2017.  The episode is written by Kevin Williamson and Julie Plec, and directed by Julie Plec.  A one-hour retrospective aired before the finale.
  Title: Daddy Issues (The Vampire Diaries)
  Passage: "Daddy Issues" is the 13th episode of the second season of The CW television series, "The Vampire Diaries" and the 35th episode of the series overall.  It originally aired on February 3, 2011.  The episode was written by Kevin Williamson and Julie Plec and directed by Joshua Butler.
  Title: The Vampire Diaries (season 2)
  Passage: The Vampire Diaries, a 40 minute American supernatural drama, was officially renewed by The CW for a full 22-episode season on February 16, 2010.  The first episode premiered on September 9, 2010, at 8 p.m. ET.  The season picks up immediately after the events of the season one finale.  All the series regulars returned.  Season two focuses on the return of Elena Gilbert's (Nina Dobrev) doppelgänger, Katherine Pierce, the introduction of werewolves, the sun and moon curse, and the arrival of the original vampires.  Tyler Lockwood's (Michael Trevino) uncle, Mason Lockwood (Taylor Kinney), arrives in town searching for the moonstone, a family heirloom.  Tyler later learns of his family's werewolf curse.  Meanwhile, Caroline Forbes (Candice Accola) is killed by Katherine while having Damon Salvatore's (Ian Somerhalder) blood in her system, turning her into a vampire.  The arrival of the original vampires, Elijah (Daniel Gillies) and Klaus Mikaelson (Joseph Morgan), also bring about complications.  Klaus is a vampire-werewolf hybrid, but his werewolf side had been forced into dormancy by witches, as nature would not stand for such an imbalance in power.  Therefore, Klaus arrives in town with plans to break the curse and unleash his werewolf side by channelling the power of the full moon into the moonstone, sacrificing a vampire and a werewolf, and drinking the blood of the doppelgänger.  The season is currently on air in Urdu on filmax channel in Pakistan.  It became available on DVD and Blu-ray on August 30, 2011.
  Title: List of The Vampire Diaries characters
  Passage: "The Vampire Diaries" is an American fantasy-drama television series which was first broadcast on The CW from 2009 to 2017, airing 171 episodes over 8 seasons.  Kevin Williamson and Julie Plec adapted the TV series from L.J. Smith's novel series of the same name.  Some of the characters appeared in the spin-off series, "The Originals".
  Title: List of The Originals episodes
  Passage: "The Originals" is an American supernatural drama television series created by Julie Plec for The CW.  A spin-off of "The Vampire Diaries", the series makes use of certain characters and story elements from the series of books of the same name.  The first season premiered with a special preview on October 3, 2013, following the season premiere of its parent series, before premiering in its regular time slot on October 8, 2013.
  Title: The Tomorrow People (U.S. TV series)
  Passage: The Tomorrow People is an American science fiction television series developed by Greg Berlanti, Phil Klemmer, and Julie Plec which aired on The CW during the 2013–14 American television season.  It was a remake of the original British television series of the same name, created by Roger Price, which ran from 1973–79.  The series follows a group of young people who possess psionic powers as the result of human evolution.
  Title: The Vampire Diaries
  Passage: The Vampire Diaries is an American supernatural drama television series developed by Kevin Williamson and Julie Plec, based on the popular book series of the same name written by L. J. Smith.  The series premiered on The CW on September 10, 2009 and concluded on March 10, 2017, airing 171 episodes over eight seasons.
  Title: Michael Trevino
  Passage: Michael Anthony Trevino (born January 25, 1985) is a Mexican-American actor.  He is known for his role as Tyler Lockwood in The CW's series "The Vampire Diaries".
citations: Michael Trevino The Vampire Diaries