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 ":".
The
loss
of
Fran
Tarkenton
to
retirement
in
the
off-season
meant
third-year
quarterback
Tommy
Kramer
became
the
starter
.
The:O
loss:O
of:O
Fran:person-athlete
Tarkenton:person-athlete
to:O
retirement:O
in:O
the:O
off-season:O
meant:O
third-year:O
quarterback:O
Tommy:person-athlete
Kramer:person-athlete
became:O
the:O
starter:O
.:O