With no explanation, label each line with "O", "location-mountain", "person-actor", "person-artist/author", "person-other", "art-broadcastprogram", "art-film", "art-music", "art-other" or "art-painting" preceded by ":".
When
a
re-enactment
of
Dot
’
s
1936
barefoot
ascent
of
Crater
Bluff
was
made
,
Rona
played
Dot
and
Wade
played
the
part
of
Dr
Eric
Dark
,
Dot
’
s
climbing
companion
.
When:O
a:O
re-enactment:O
of:O
Dot:person-other
’:O
s:O
1936:O
barefoot:O
ascent:O
of:O
Crater:location-mountain
Bluff:location-mountain
was:O
made:O
,:O
Rona:person-artist/author
played:O
Dot:person-other
and:O
Wade:person-actor
played:O
the:O
part:O
of:O
Dr:O
Eric:person-other
Dark:person-other
,:O
Dot:person-other
’:O
s:O
climbing:O
companion:O
.:O