With no explanation, label each line with "O", "organization-government/governmentagency", "person-politician", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting" or "art-writtenart" preceded by ":".
Matsch
was
nominated
by
President
Richard
Nixon
on
January
31
,
1974
,
to
a
seat
on
the
United
States
District
Court
for
the
District
of
Colorado
vacated
by
Judge
Olin
Hatfield
Chilson
.
Matsch:person-other
was:O
nominated:O
by:O
President:O
Richard:person-politician
Nixon:person-politician
on:O
January:O
31:O
,:O
1974:O
,:O
to:O
a:O
seat:O
on:O
the:O
United:organization-government/governmentagency
States:organization-government/governmentagency
District:organization-government/governmentagency
Court:organization-government/governmentagency
for:organization-government/governmentagency
the:organization-government/governmentagency
District:organization-government/governmentagency
of:organization-government/governmentagency
Colorado:organization-government/governmentagency
vacated:O
by:O
Judge:O
Olin:person-other
Hatfield:person-other
Chilson:person-other
.:O