With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
The
violence
of
these
types
of
protests
then
continued
through
the
rest
of
the
1970s
.
The:O
violence:O
of:O
these:O
types:O
of:O
protests:O
then:O
continued:O
through:O
the:O
rest:O
of:O
the:O
1970s:O
.:O