With no explanation, label each line with "O", "person-artist/author", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
In
March
2013
Mahy
performed
at
Pants
Off
!
In:O
March:O
2013:O
Mahy:person-artist/author
performed:O
at:O
Pants:O
Off:O
!:O