With no explanation, label each line with "O", "art-broadcastprogram", "art-film", "art-music", "art-other", "art-painting", "art-writtenart", "building-airport", "building-hospital" or "building-hotel" preceded by ":".
Relay
stations
were
set
up
every
25–30
miles
or
an
average
day
’
s
journey
on
horse
.
Relay:O
stations:O
were:O
set:O
up:O
every:O
25–30:O
miles:O
or:O
an:O
average:O
day:O
’:O
s:O
journey:O
on:O
horse:O
.:O