With no explanation, label each line with "O", "event-sportsevent", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
In
1984
the
Sevens
date
was
switched
to
the
Spring
-
the
Sunday
prior
to
the
first
Monday
in
May
.
In:O
1984:O
the:O
Sevens:event-sportsevent
date:O
was:O
switched:O
to:O
the:O
Spring:O
-:O
the:O
Sunday:O
prior:O
to:O
the:O
first:O
Monday:O
in:O
May:O
.:O