With no explanation, label each line with "O", "location-road/railway/highway/transit", "location-mountain", "building-airport", "location-GPE", "art-broadcastprogram", "art-film", "art-music", "art-other" or "art-painting" preceded by ":".
Unterterzen
has
a
train
station
,
where
(
as
of
2016
)
the
S4
(
circling
around
the
Säntis
mountain
range
)
and
(
on
weekends
)
the
S2
(
Zurich
Main
Station
&
amp
;
Airport
)
stop
.
Unterterzen:location-GPE
has:O
a:O
train:O
station:O
,:O
where:O
(:O
as:O
of:O
2016:O
):O
the:O
S4:location-road/railway/highway/transit
(:O
circling:O
around:O
the:O
Säntis:location-mountain
mountain:O
range:O
):O
and:O
(:O
on:O
weekends:O
):O
the:O
S2:location-road/railway/highway/transit
(:O
Zurich:building-airport
Main:building-airport
Station:building-airport
&:building-airport
amp:building-airport
;:building-airport
Airport:building-airport
):O
stop:O
.:O