Question: What did the man whose cabinet Thomas Walsh joined as Minister for Agriculture lead the introduction of?
Sentence (from "Éamon de Valera"): Éamon de Valera ( ; ] ; first registered as George de Valero; changed some time before 1901 to Edward de Valera; 14 October 1882 – 29 August 1975) was a prominent politician and statesman in 20th-century Ireland.
Relevant evidence: No