<prompt> Translate the following text to EnglishWatafiti walipata kwamba watoto hao walisikiliza kwa muda mrefu zaidi kaseti ambazo hazikuwa na maneno hayo kuliko zile zilizokuwa nazo, jambo ambalo lilionyesha kwamba walikuwa wamejifunza maneno hayo.  <response>: The infants, they found, listened longer to subsequent tapes that didnt contain these words than to those that did--suggesting the babies had learned the words. 