With no explanation, label each line with "O", "product-software", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
MSBuild
is
free
and
open-source
.
MSBuild:product-software
is:O
free:O
and:O
open-source:O
.:O