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 ":".
Summer
daytime
highs
often
reach
the
upper
80s
to
low
90s
°F
(
29
to
35
°C
)
.
Summer:O
daytime:O
highs:O
often:O
reach:O
the:O
upper:O
80s:O
to:O
low:O
90s:O
°F:O
(:O
29:O
to:O
35:O
°C:O
):O
.:O