With no explanation, label each line with "location-GPE", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
From
US
-50
,
water
is
only
usually
visible
in
the
spring
months
.
From:O
US:location-GPE
-50:O
,:O
water:O
is:O
only:O
usually:O
visible:O
in:O
the:O
spring:O
months:O
.:O