Stations having "diamond" and "emerald" in
their name or remarks (or various other fields):
diamond emerald
Stations owned by George Michael or Boy George or any
George:
owner:george
Stations measuring temperature in Celduin:
variable:temperature in:celduin
German stations that have time series:
in:germany ts_only:
Stations that have at least one time series whose time range
contains 1988, at least one time series whose time range
contains 1989, and at least one time series whose time range
contains 2004:
ts_has_years:1988,1989,2004