With no explanation, label each line with "O", "person-politician", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
They
continued
to
serve
under
Qin
after
Qin
had
rebelled
against
the
rule
of
Emperor
Xizong
and
declared
himself
emperor
.
They:O
continued:O
to:O
serve:O
under:O
Qin:person-politician
after:O
Qin:person-politician
had:O
rebelled:O
against:O
the:O
rule:O
of:O
Emperor:O
Xizong:person-politician
and:O
declared:O
himself:O
emperor:O
.:O