With no explanation, label each line with "product-other", "O", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
The
Empress
of
Ireland
domestic
Permanent
stamp
was
designed
by
Isabelle
Toussaint
,
and
is
lithographed
in
seven
colours
.
The:product-other
Empress:product-other
of:product-other
Ireland:product-other
domestic:O
Permanent:product-other
stamp:O
was:O
designed:O
by:O
Isabelle:person-other
Toussaint:person-other
,:O
and:O
is:O
lithographed:O
in:O
seven:O
colours:O
.:O