Question: What is the date of death of Padmanabhan Nair's wife?
Sentence (from "Padmanabhan Nair"): Kalamandalam Padmanabhan Nair (1928–2007) was an eminent Kathakali exponent, equally known for his capacities as a tutor, theoretician and author of a few authentic texts on the classical dance-drama from Kerala in south India.
Relevant evidence: No