With no explanation, label each line with "location-GPE", "O", "event-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
In
the
period
of
1831-1838
,
during
the
Belgian
Revolution
,
many
Dutch
soldiers
were
encamped
at
Rijen
.
In:O
the:O
period:O
of:O
1831-1838:O
,:O
during:O
the:O
Belgian:event-other
Revolution:event-other
,:O
many:O
Dutch:location-GPE
soldiers:O
were:O
encamped:O
at:O
Rijen:location-GPE
.:O