Question: When is Mayantha Dissanayake's father's birthday?
Sentence (from "Gamini Dissanayake"): Dissanayake Mudiyanse Ralahamilage Lionel Gamini Dissanayake (known as Gamini Dissanayake; ,; 20 March 1942 – 24 October 1994) was a prominent Sri Lankan politician, a powerful minister of the United National Party, and Leader of the Opposition.
Relevant evidence: Yes