With no explanation, label each line with "O", "product-train", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
units
can
work
in
multiple
with
Class
221
units
but
not
Class
222
units
as
the
electrical
connections
of
the
Class
222
units
are
incompatible
with
the
Class
220
.
The:O
units:O
can:O
work:O
in:O
multiple:O
with:O
Class:product-train
221:product-train
units:O
but:O
not:O
Class:product-train
222:product-train
units:O
as:O
the:O
electrical:O
connections:O
of:O
the:O
Class:product-train
222:product-train
units:O
are:O
incompatible:O
with:O
the:O
Class:product-train
220:product-train
.:O