With no explanation, label each line with "location-GPE", "O", "person-politician", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Vishwanath
Pratap
Singh
was
sworn
in
as
Prime
Minister
of
India
on
2
December
1989
.
Vishwanath:person-politician
Pratap:person-politician
Singh:person-politician
was:O
sworn:O
in:O
as:O
Prime:O
Minister:O
of:O
India:location-GPE
on:O
2:O
December:O
1989:O
.:O