With no explanation, label each line with "O", "other-biologything", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Mutations
in
``
S.
pombe
``
cdt1
blocked
DNA
replication
.
Mutations:O
in:O
``:O
S.:other-biologything
pombe:other-biologything
``:O
cdt1:O
blocked:O
DNA:other-biologything
replication:O
.:O