With no explanation, label each line with "O", "person-artist/author", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
He
was
signed
by
the
Seattle
Seahawks
as
an
undrafted
free
agent
in
2006
.
He:O
was:O
signed:O
by:O
the:O
Seattle:person-artist/author
Seahawks:person-artist/author
as:O
an:O
undrafted:O
free:O
agent:O
in:O
2006:O
.:O