They were developed by Armstrong Siddeley in Coventry , which later became Bristol Siddeley in 1959 , and finally Rolls - Royce in 1966 .
Head entity: rolls-royce Q679888 19 20 21
Tail entity: bristol siddeley Q530523 12 13
Relation (head \u2192 tail): P156
Inverse relation (tail \u2192 head): P155