question: What is the official name of the league, due to sponsorship reasons, in which Souvik Chakrabarti plays?
answer: Hero Indian Super League
context: Title: Indian Super League
  Passage: The Indian Super League (ISL) is a men's professional football league in India.  For sponsorship reasons, the league is officially known as the Hero Indian Super League.  One of the top football leagues in the country, it currently shares the top spot in the Indian football league system with the I-League.  The league comprises 10 teams and will run for five months from November to March starting with the 2017–18 season.
  Title: Telekom S-League
  Passage: The Telekom S-League, commonly known as just the Solomon Islands S-League or more simply the S-League for sponsorship reasons, is a semi professional league and the top division of the Solomon Islands Football Federation.  It was known as the Solomon Islands National Club Championship from 2003 till 2010, when the official name was changed.
  Title: CAF Champions League
  Passage: The CAF Champions League is an annual continental club football competition run by the Confederation of African Football (CAF).  The top club sides from Africa's football leagues are invited to participate in this competition, which is the premier club football competition in the continent and the equivalent to the UEFA Champions League.  Due to sponsorship reasons, the official name is Total CAF Champions League, with Total Champions League also in use.
  Title: Nemzeti Bajnokság I (men's handball)
  Passage: The Nemzeti Bajnokság I (English: National Championship I , commonly abbreviated NB I) is the premier men's professional handball league in Hungary, administered by the Hungarian Handball Federation.  Since 2006 the official name of the championship is "Budapest Bank Férfi Kézilabda Liga" due to sponsorship reasons.
  Title: Souvik Chakrabarti
  Passage: Souvik Chakrabarti (born 12 July 1991 in Kolkata, West Bengal) is an Indian footballer who plays as a central midfielder for club Jamshedpur FC in the Indian Super League.
citations: Indian Super League Souvik Chakrabarti