With no explanation, label each line with "O", "event-other", "location-GPE", "other-chemicalthing", "organization-government/governmentagency", "art-broadcastprogram", "art-film", "art-music", "art-other" or "art-painting" preceded by ":".
In
December
2004
,
using
credit
card
information
provided
by
the
DEA
,
British
police
arrested
22
UK
residents
who
had
purchased
2C-I
through
the
seized
web
sites
(
Operation
Ismene
)
.
In:O
December:O
2004:O
,:O
using:O
credit:O
card:O
information:O
provided:O
by:O
the:O
DEA:organization-government/governmentagency
,:O
British:location-GPE
police:O
arrested:O
22:O
UK:location-GPE
residents:O
who:O
had:O
purchased:O
2C-I:other-chemicalthing
through:O
the:O
seized:O
web:O
sites:O
(:O
Operation:event-other
Ismene:event-other
):O
.:O