With no explanation, label each line with "person-athlete", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Thigpen
competed
with
Matt
Cassel
for
the
starting
quarterback
position
.
Thigpen:person-athlete
competed:O
with:O
Matt:person-athlete
Cassel:person-athlete
for:O
the:O
starting:O
quarterback:O
position:O
.:O