With no explanation, label each line with "location-GPE", "O", "building-airport", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-hospital" preceded by ":".
Strigino
is
one
of
the
top
25
busiest
airports
in
Russia
.
Strigino:building-airport
is:O
one:O
of:O
the:O
top:O
25:O
busiest:O
airports:O
in:O
Russia:location-GPE
.:O