With no explanation, label each line with "location-GPE", "O", "person-politician", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Through
Robert
the
Strong
he
was
grandfather
of
two
kings
of
Western
Francia
,
Odo
and
Robert
.
Through:O
Robert:person-politician
the:person-politician
Strong:person-politician
he:O
was:O
grandfather:O
of:O
two:O
kings:O
of:O
Western:location-GPE
Francia:location-GPE
,:O
Odo:person-politician
and:O
Robert:person-politician
.:O