With no explanation, label each line with "O", "organization-company", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
The
new
entity
,
which
merges
Serono
with
Merck
's
Ethicals
division
,
is
called
Merck
Serono
.
The:O
new:O
entity:O
,:O
which:O
merges:O
Serono:organization-company
with:O
Merck:O
's:O
Ethicals:O
division:O
,:O
is:O
called:O
Merck:organization-company
Serono:organization-company
.:O