With no explanation, label each line with "O", "organization-company", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport" or "building-hospital" preceded by ":".
In
addition
to
his
work
at
the
Conservatorium
,
he
also
gave
private
lessons
,
which
not
infrequently
ended
in
long
discussions
about
philosophy
or
politics
.
In:O
addition:O
to:O
his:O
work:O
at:O
the:O
Conservatorium:organization-company
,:O
he:O
also:O
gave:O
private:O
lessons:O
,:O
which:O
not:O
infrequently:O
ended:O
in:O
long:O
discussions:O
about:O
philosophy:O
or:O
politics:O
.:O