With no explanation, label each line with "location-GPE", "O", "person-athlete", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
The
mantle
of
undisputed
champion
of
the
world
rested
on
his
shoulders
after
his
defeat
of
the
tough
Scottish
fighter
Jackie
Paterson
on
23
March
1948
.
The:O
mantle:O
of:O
undisputed:O
champion:O
of:O
the:O
world:O
rested:O
on:O
his:O
shoulders:O
after:O
his:O
defeat:O
of:O
the:O
tough:O
Scottish:location-GPE
fighter:O
Jackie:person-athlete
Paterson:person-athlete
on:O
23:O
March:O
1948:O
.:O