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 ":".
Both
his
grandfather
and
father
were
sculptors
.
Both:O
his:O
grandfather:O
and:O
father:O
were:O
sculptors:O
.:O