Assertion: drainage basin's part | /r/HasProperty | the white tower
Facets:
Source sentences:
text: The earliest part of the fortification, the White Tower (centre right), was built in the 11th century and was later topped by four cupolas; the Traitors' Gate (centre left) dates from the 13th century.
text: The main part of the river are the Black Volta, the White Volta, and the Red Volta.