With no explanation, label each line with "person-soldier", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
López
Rivera
was
never
conclusively
linked
to
the
bombings
.
López:person-soldier
Rivera:person-soldier
was:O
never:O
conclusively:O
linked:O
to:O
the:O
bombings:O
.:O