With no explanation, label each line with "O", "person-athlete", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Los
Angeles
Rams
quarterback
Bob
Waterfield
served
as
an
advisory
backfield
coach
as
the
team
prepared
for
its
bowl
game
.
Los:O
Angeles:O
Rams:O
quarterback:O
Bob:person-athlete
Waterfield:person-athlete
served:O
as:O
an:O
advisory:O
backfield:O
coach:O
as:O
the:O
team:O
prepared:O
for:O
its:O
bowl:O
game:O
.:O