What is the power in KW that has a station type of relay and a callsign of DXCL-TV?
create table table_24673888_1 (power_kw varchar, station_type varchar, callsign varchar, PRIMARY KEY (power_kw))
select power_kw from table_24673888_1 where station_type = "relay" and callsign = "dxcl-tv"