Question: When did Nagammai's husband die?
Sentence (from "Periyar E. V. Ramasamy"): Erode Venkatappa Ramasamy (17 September 1879 – 24 December 1973), commonly known as Periyar, also referred to as Thanthai Periyar, was an Indian social activist and politician who started the Self-Respect Movement and Dravidar Kazhagam.
Relevant evidence: Yes