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 ":".
Brown
left
the
legislature
in
January
2014
,
when
he
was
selected
by
US
Senator
Mike
Lee
to
be
his
deputy
chief
of
staff
.
Brown:person-politician
left:O
the:O
legislature:O
in:O
January:O
2014:O
,:O
when:O
he:O
was:O
selected:O
by:O
US:location-GPE
Senator:O
Mike:person-politician
Lee:person-politician
to:O
be:O
his:O
deputy:O
chief:O
of:O
staff:O
.:O