What concepts are described in the following sentence?

"The 1st runway of Alderney airport, which serves the city of Alderney, is made of poaceae and is 497.0 long."

Return the answer as pairs of triples.
Alderney Airport 1ST_RUNWAY_SURFACE_TYPE Poaceae
Alderney Airport RUNWAY_LENGTH 497.0
Alderney Airport CITY_SERVED Alderney