With no explanation, label each line with "location-GPE", "O", "event-sportsevent", "building-sportsfacility", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
The
1981
Fischer-Grand
Prix
was
a
men
's
tennis
tournament
played
on
indoor
hard
courts
at
the
Wiener
Stadthalle
in
Vienna
in
Austria
that
was
part
of
the
1981
Volvo
Grand
Prix
.
The:O
1981:O
Fischer-Grand:event-sportsevent
Prix:event-sportsevent
was:O
a:O
men:O
's:O
tennis:O
tournament:O
played:O
on:O
indoor:O
hard:O
courts:O
at:O
the:O
Wiener:building-sportsfacility
Stadthalle:building-sportsfacility
in:O
Vienna:location-GPE
in:O
Austria:location-GPE
that:O
was:O
part:O
of:O
the:O
1981:O
Volvo:event-sportsevent
Grand:event-sportsevent
Prix:event-sportsevent
.:O