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 ":".
Sun
Liang
eventually
chose
to
pardon
Sun
Ji
.
Sun:person-politician
Liang:person-politician
eventually:O
chose:O
to:O
pardon:O
Sun:person-politician
Ji:person-politician
.:O