With no explanation, label each line with "location-GPE", "O", "event-attack/battle/war/militaryconflict", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
While
located
in
Mountpottinger
the
hospital
was
severely
damaged
in
the
Belfast
Blitz
in
1941
.
While:O
located:O
in:O
Mountpottinger:location-GPE
the:O
hospital:O
was:O
severely:O
damaged:O
in:O
the:O
Belfast:event-attack/battle/war/militaryconflict
Blitz:event-attack/battle/war/militaryconflict
in:O
1941:O
.:O