With no explanation, label each line with "O", "other-chemicalthing", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
Important
examples
include
the
sandwich
and
half-sandwich
complexes
,
respectively
,
Cr
(
C6H6
)
2
and
[
RuCl2
(
C6H6
)
]
2
.
Important:O
examples:O
include:O
the:O
sandwich:O
and:O
half-sandwich:O
complexes:O
,:O
respectively:O
,:O
Cr:other-chemicalthing
(:other-chemicalthing
C6H6:other-chemicalthing
):other-chemicalthing
2:other-chemicalthing
and:O
[:other-chemicalthing
RuCl2:other-chemicalthing
(:other-chemicalthing
C6H6:other-chemicalthing
):other-chemicalthing
]:other-chemicalthing
2:other-chemicalthing
.:O