With no explanation, label each line with "location-GPE", "O", "event-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart" or "building-airport" preceded by ":".
The
75th
World
Science
Fiction
Convention
(
Worldcon
)
,
also
known
as
Worldcon
75
,
was
held
9–13
August
2017
at
the
Helsinki
Exhibition
and
Convention
Centre
in
Helsinki
,
Finland
.
The:O
75th:event-other
World:event-other
Science:event-other
Fiction:event-other
Convention:event-other
(:O
Worldcon:O
):O
,:O
also:O
known:O
as:O
Worldcon:event-other
75:event-other
,:O
was:O
held:O
9–13:O
August:O
2017:O
at:O
the:O
Helsinki:O
Exhibition:O
and:O
Convention:O
Centre:O
in:O
Helsinki:location-GPE
,:O
Finland:location-GPE
.:O