With no explanation, label each line with "O", "other-chemicalthing", "location-road/railway/highway/transit", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
Large
quantities
of
phosphorus
entered
the
Kootenay
River
;
the
cause
of
cyanobacterial
blooms
from
the
1950s
until
the
early
1970s
.
Large:O
quantities:O
of:O
phosphorus:other-chemicalthing
entered:O
the:location-road/railway/highway/transit
Kootenay:location-road/railway/highway/transit
River:location-road/railway/highway/transit
;:O
the:O
cause:O
of:O
cyanobacterial:O
blooms:O
from:O
the:O
1950s:O
until:O
the:O
early:O
1970s:O
.:O