With no explanation, label each line with "building-other", "O", "location-road/railway/highway/transit", "location-GPE", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other" or "art-painting" preceded by ":".
So
Melnikov
and
another
colleague
traveled
to
the
United
States
in
1839
to
study
railroad
technology
,
where
they
met
George
Washington
Whistler
,
who
designed
the
Canton
Viaduct
for
the
Boston
and
Providence
Railroad
.
So:O
Melnikov:person-other
and:O
another:O
colleague:O
traveled:O
to:O
the:O
United:location-GPE
States:location-GPE
in:O
1839:O
to:O
study:O
railroad:O
technology:O
,:O
where:O
they:O
met:O
George:person-other
Washington:person-other
Whistler:person-other
,:O
who:O
designed:O
the:O
Canton:building-other
Viaduct:building-other
for:O
the:O
Boston:location-road/railway/highway/transit
and:location-road/railway/highway/transit
Providence:location-road/railway/highway/transit
Railroad:location-road/railway/highway/transit
.:O