With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
She
assisted
him
on
the
1960
Guatemala
archaeological
excavation
.
She:O
assisted:O
him:O
on:O
the:O
1960:O
Guatemala:O
archaeological:O
excavation:O
.:O