an Entity references as follows:
The River Cynon (Welsh: Afon Cynon) in South Wales is a main tributary of the Taff. Its source is the rising of (OS grid ref SN 95240 07740) at 219 m (719 ft) above sea level at Penderyn, Rhondda Cynon Taf and flows roughly southeast, into the Taff at Abercynon in the same district. The water emerging at Llygad Cynon has been traced back to the sink of the Nant Cadlan at .