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 ":".
Two
days
later
Santana
regained
the
championship
before
Villano
III
regained
it
on
December
21
.
Two:O
days:O
later:O
Santana:person-athlete
regained:O
the:O
championship:O
before:O
Villano:person-athlete
III:person-athlete
regained:O
it:O
on:O
December:O
21:O
.:O