question: Where is the surf reef break located in where Carol Philips compete against the men?
answer: Hawaii
context: Title: Carol Philips
  Passage: Carol Philips (born 1966) is a pioneer of big-wave bodyboarding for women.  She was the first woman to compete against the men at the Banzai Pipeline on the North Shore (Oʻ ahu).  She founded the World Championship of Women's Bodyboarding in memory of Don and Josie Over in 1990.  She was the first woman to hold a permit to run a contest at the Banzai Pipeline.  Philips is the founder of the North Shore Surf Girls - Surf School.
  Title: Banzai Pipeline
  Passage: The Banzai Pipeline, or simply "Pipeline" or "Pipe," is a surf reef break located in Hawaii, off Ehukai Beach Park in Pupukea on O'ahu's North Shore.  A reef break is an area in the ocean where waves start to break once they reach the shallows of a reef.  Pipeline is notorious for huge waves which break in shallow water just above a sharp and cavernous reef, forming large, hollow, thick curls of water that surfers can tube ride.  There are three reefs at Pipeline in progressively deeper water further out to sea that activate according to the increasing size of approaching ocean swells.
  Title: Surf break
  Passage: A surf break (also break, shore break, or big wave break) is a permanent (or semi permanent) obstruction such as a coral reef, rock, shoal, or headland that causes a wave to break, forming a barreling wave or other wave that can be surfed, before it eventually collapses.  The topography of the seabed determines the shape of the wave and type of break.  Since shoals can change size and location, affecting the break, it takes commitment and skill to find good breaks.  Some surf breaks are quite dangerous, since the surfer can collide with a reef or rocks below the water.
citations: Carol Philips Banzai Pipeline