With no explanation, label each line with "person-athlete", "organization-sportsteam", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Mensah
started
his
professional
career
with
Tema
Youth
before
moving
to
Club
Africain
in
2013
.
Mensah:person-athlete
started:O
his:O
professional:O
career:O
with:O
Tema:organization-sportsteam
Youth:organization-sportsteam
before:O
moving:O
to:O
Club:organization-sportsteam
Africain:organization-sportsteam
in:O
2013:O
.:O