With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
When
evidence
of
electoral
cheating
by
then
President
Gloria
Macapagal-Arroyo
became
public
,
TG
Guingona
actively
endorsed
and
pursued
her
impeachment
.
When:O
evidence:O
of:O
electoral:O
cheating:O
by:O
then:O
President:O
Gloria:O
Macapagal-Arroyo:O
became:O
public:O
,:O
TG:O
Guingona:O
actively:O
endorsed:O
and:O
pursued:O
her:O
impeachment:O
.:O