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
two
trumpeters
sitting
on
grey
horses
were
historically
intended
to
form
a
contrast
with
the
darker
horses
,
so
that
they
could
be
seen
on
battlefields
when
relaying
officers
'
commands
to
the
troops
.
The:O
two:O
trumpeters:O
sitting:O
on:O
grey:O
horses:O
were:O
historically:O
intended:O
to:O
form:O
a:O
contrast:O
with:O
the:O
darker:O
horses:O
,:O
so:O
that:O
they:O
could:O
be:O
seen:O
on:O
battlefields:O
when:O
relaying:O
officers:O
':O
commands:O
to:O
the:O
troops:O
.:O