Complex sentence: The hunt begins at noon on the Friday before Martin Luther King, Jr. Day when the teams assemble in the lobby of Building 7 to receive the first puzzles and concludes with a runaround to find a "coin" hidden on MIT's campus.
Split into simpler sentences: The hunt begins at noon on the Friday before Martin Luther King, Jr. Day when the teams assemble in the lobby of Building 7 to receive the first puzzles. It concludes with a runaround to find a "coin" hidden on MIT's campus.