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 ":".
When
it
was
completed
,
the
building
that
housed
the
old
church
and
school
became
the
church
hall
.
When:O
it:O
was:O
completed:O
,:O
the:O
building:O
that:O
housed:O
the:O
old:O
church:O
and:O
school:O
became:O
the:O
church:O
hall:O
.:O