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 ":".
Martinez
scored
a
knockdown
in
the
10th
round
and
most
ringside
observers
believed
he
had
a
decided
edge
in
the
contest
.
Martinez:person-athlete
scored:O
a:O
knockdown:O
in:O
the:O
10th:O
round:O
and:O
most:O
ringside:O
observers:O
believed:O
he:O
had:O
a:O
decided:O
edge:O
in:O
the:O
contest:O
.:O