With no explanation, label each line with "location-GPE", "person-soldier", "O", "product-airplane", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
Kovzan
's
second
aerial
ramming
took
place
over
Torzhok
on
21
February
1942
;
in
that
attack
he
rammed
a
Junkers
Ju
88
while
flying
a
Yak-1
and
again
managed
to
land
his
damaged
plane
at
an
airfield
after
using
it
in
a
ramming
.
Kovzan:person-soldier
's:O
second:O
aerial:O
ramming:O
took:O
place:O
over:O
Torzhok:location-GPE
on:O
21:O
February:O
1942:O
;:O
in:O
that:O
attack:O
he:O
rammed:O
a:O
Junkers:product-airplane
Ju:product-airplane
88:product-airplane
while:O
flying:O
a:O
Yak-1:product-airplane
and:O
again:O
managed:O
to:O
land:O
his:O
damaged:O
plane:O
at:O
an:O
airfield:O
after:O
using:O
it:O
in:O
a:O
ramming:O
.:O