With no explanation, label each line with "other-livingthing", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Additional
species
that
have
been
recognized
more
recently
as
aggressive
and
requiring
control
are
yellow
star
thistle
(
``
Centaurea
solstitialis
``
)
,
sweet
clover
(
``
Melilot
``
spp
.
Additional:O
species:O
that:O
have:O
been:O
recognized:O
more:O
recently:O
as:O
aggressive:O
and:O
requiring:O
control:O
are:O
yellow:other-livingthing
star:other-livingthing
thistle:other-livingthing
(:O
``:O
Centaurea:other-livingthing
solstitialis:other-livingthing
``:O
):O
,:O
sweet:other-livingthing
clover:other-livingthing
(:O
``:O
Melilot:other-livingthing
``:O
spp:O
.:O