With no explanation, label each line with "location-GPE", "O", "person-athlete", "event-sportsevent", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
At
the
2008
Halle
Open
in
Germany
,
where
he
was
the
runner
up
in
2007
,
he
lost
to
Roger
Federer
in
the
quarterfinals
.
At:O
the:event-sportsevent
2008:event-sportsevent
Halle:event-sportsevent
Open:event-sportsevent
in:O
Germany:location-GPE
,:O
where:O
he:O
was:O
the:O
runner:O
up:O
in:O
2007:O
,:O
he:O
lost:O
to:O
Roger:person-athlete
Federer:person-athlete
in:O
the:O
quarterfinals:O
.:O