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 ":".
Chromium
is
an
OpenGL
implementation
.
Chromium:product-software
is:O
an:O
OpenGL:O
implementation:O
.:O