With no explanation, label each line with "O", "other-chemicalthing", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Polyaspartic
acid
can
also
be
synthesized
by
polymerization
of
maleic
anhydride
in
presence
of
ammonium
hydroxide
.
Polyaspartic:other-chemicalthing
acid:other-chemicalthing
can:O
also:O
be:O
synthesized:O
by:O
polymerization:O
of:O
maleic:other-chemicalthing
anhydride:other-chemicalthing
in:O
presence:O
of:O
ammonium:other-chemicalthing
hydroxide:other-chemicalthing
.:O