With no explanation, label each line with "location-GPE", "O", "location-bodiesofwater", "location-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
The
Colorado
River
Aqueduct
crosses
the
midpoint
of
the
valley
at
Vidal
Junction
,
California
.
The:O
Colorado:location-bodiesofwater
River:location-bodiesofwater
Aqueduct:location-bodiesofwater
crosses:O
the:O
midpoint:O
of:O
the:O
valley:O
at:O
Vidal:location-other
Junction:location-other
,:O
California:location-GPE
.:O