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 ":".
Sulfones
are
prepared
under
conditions
used
for
Friedel–Crafts
reactions
using
sources
of
RSO2+
derived
from
sulfonyl
halides
and
sulfonic
acid
anhydrides
.
Sulfones:other-chemicalthing
are:O
prepared:O
under:O
conditions:O
used:O
for:O
Friedel–Crafts:other-chemicalthing
reactions:O
using:O
sources:O
of:O
RSO2+:other-chemicalthing
derived:O
from:O
sulfonyl:other-chemicalthing
halides:other-chemicalthing
and:O
sulfonic:other-chemicalthing
acid:other-chemicalthing
anhydrides:other-chemicalthing
.:O