With no explanation, label each line with "location-GPE", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Food
is
one
of
Sierra
Leone
's
biggest
imports
.
Food:O
is:O
one:O
of:O
Sierra:location-GPE
Leone:location-GPE
's:O
biggest:O
imports:O
.:O