question: Which river crossed the city which was at 40 km southwest from Fabro?
answer: Tiber
context: Title: Yengo National Park
  Passage: The Yengo National Park is a protected national park that is located in the Lower Hunter region of New South Wales, in eastern Australia.  The 154328 ha park is situated 85 km northwest of the Sydney central business district, 40 km south of Cessnock , 40 km north of Wisemans Ferry , and 155 km southwest of Newcastle .
  Title: Perugia
  Passage: Perugia (] ; ) is the capital city of both the region of Umbria in central Italy, crossed by the river Tiber, and of the province of Perugia.
  Title: Fabro
  Passage: Fabro is a "comune" (municipality) in the Province of Terni in the Italian region Umbria, located about 40 km southwest of Perugia and about 60 km northwest of Terni.
  Title: Torre San Giorgio
  Passage: Torre San Giorgio is a "comune" (municipality) in the Province of Cuneo in the Italian region Piedmont, located about 40 km southwest of Turin and about 40 km north of Cuneo.  As of 31 December 2004, it had a population of 696 and an area of 5.4 km2 .
  Title: Albonese
  Passage: Albonese is a "comune" (municipality) in the Province of Pavia in the Italian region Lombardy, located about 40 km southwest of Milan and about 40 km northwest of Pavia.  It has an area of 4.3 km² and, on 31 December 2004, it had a population of 492.
  Title: Anthiro
  Passage: Anthiro (Greek: Ανθηρό ) is a mountain village in the western part of the Karditsa regional unit, Greece.  Anthiro is the seat of the municipality of Argithea.  Anthiro had a population of 462 in 2011.  Anthiro is located 20 km southwest of Mouzaki, 40 km west of Karditsa, and 19 km southwest of Pyli.
citations: Perugia Fabro