Complex sentence: The Rose Garden and Winterhawks hold the Western Hockey League's record for single game attendance with a crowd of 19,103 on March 15,1997 in which Portland tied the visiting Seattle Thunderbirds, 6--6.
Split into simpler sentences: The Rose Garden and Portland Winter Hawks hold the Western Hockey League's record for single game attendance with a crowd of 19,103 on March 15,1997. The Winter Hawks tied the visiting Seattle Thunderbirds, 6--6.