sentences:  In the 1940s, Martínez purchased a now-standard three-row button accordion.During World War II, there was a lack of materials due to the war effort, so most musicians were unable to make recordings.After the war had ended, Martínez was one of the first musicians to resume recording, this time with Ideal Records, a small Mexican American label co-founded by Paco Betancourt in San Benito, Texas.