With no explanation, label each line with "product-other", "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
In
December
2017
,
a
copy
of
the
Sharp
X1
version
was
bought
at
a
Yahoo
!
In:O
December:O
2017:O
,:O
a:O
copy:O
of:O
the:O
Sharp:product-other
X1:product-other
version:O
was:O
bought:O
at:O
a:O
Yahoo:O
!:O