With no explanation, label each line with "location-GPE", "O", "organization-religion", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Several
Mongol
tribes
had
already
been
converted
by
Nestorian
missionaries
in
the
7th
century
,
and
Christianity
was
therefore
a
major
influence
in
the
Mongol
Empire
.
Several:O
Mongol:location-GPE
tribes:O
had:O
already:O
been:O
converted:O
by:O
Nestorian:organization-religion
missionaries:O
in:O
the:O
7th:O
century:O
,:O
and:O
Christianity:organization-religion
was:O
therefore:O
a:O
major:O
influence:O
in:O
the:O
Mongol:location-GPE
Empire:O
.:O