Does the sentence "First conceived by Julius Lilienfeld in 1926 and practically implemented in 1947 by American physicists John Bardeen, Walter Brattain, and William Shockley, the transistor revolutionized the field of electronics, and paved the way for smaller and cheaper radios, calculators, and computers, among other things." answer the question "When was the first transistor implemented for practical use?"

Available choices:
(a). yes;
(b). no;
(a).