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 ":".
When
Frank
Hague
became
mayor
of
Jersey
City
in
1917
,
he
planned
to
expand
the
hospital
.
When:O
Frank:person-politician
Hague:person-politician
became:O
mayor:O
of:O
Jersey:location-GPE
City:location-GPE
in:O
1917:O
,:O
he:O
planned:O
to:O
expand:O
the:O
hospital:O
.:O