With no explanation, label each line with "location-GPE", "O", "person-artist/author", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Once
in
Kenya
,
it
took
Kidum
4
years
to
start
writing
his
own
songs
.
Once:O
in:O
Kenya:location-GPE
,:O
it:O
took:O
Kidum:person-artist/author
4:O
years:O
to:O
start:O
writing:O
his:O
own:O
songs:O
.:O