title: Grand Canal (Venice)
context: One end of the canal leads into the lagoon near the Santa Lucia railway station and the other end leads into the basin at San Marco; in between, it makes a large reverse-S shape through the central districts (sestieri) of Venice. It is 3.8km (2.4mi) long, and 30 to 90m (98 to 295ft) wide, with an average depth of 5 metres (16 feet).
question: How long is the Grand Canal in Venice?
answers: 3.8km