With no explanation, label each line with "location-GPE", "O", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
His
mother
,
Begum
Shamsunnahar
Mahmud
,
was
one
of
the
most
renowned
female
educationalists
and
social
workers
in
Bengal
at
her
time
.
His:O
mother:O
,:O
Begum:person-other
Shamsunnahar:person-other
Mahmud:person-other
,:O
was:O
one:O
of:O
the:O
most:O
renowned:O
female:O
educationalists:O
and:O
social:O
workers:O
in:O
Bengal:location-GPE
at:O
her:O
time:O
.:O