With no explanation, label each line with "O", "organization-company", "product-train", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Midland
Mainline
supplemented
its
fleet
with
Class
222
Meridian
units
(
similar
to
Virgin
CrossCountry
's
Class
220
and
221
Voyager
trains
)
,
replacing
the
slower
Class
170
Turbostar
units
.
Midland:organization-company
Mainline:organization-company
supplemented:O
its:O
fleet:O
with:O
Class:product-train
222:product-train
Meridian:product-train
units:product-train
(:O
similar:O
to:O
Virgin:O
CrossCountry:product-train
's:product-train
Class:product-train
220:product-train
and:O
221:product-train
Voyager:product-train
trains:product-train
):O
,:O
replacing:O
the:O
slower:O
Class:product-train
170:product-train
Turbostar:product-train
units:product-train
.:O