Complex sentence: At the time, she had said that after these efforts stopped Genie's ungrammatical sentences ceased; however, in a 1981 paper she used many of these utterances to demonstrate Genie's lack of overall grammar acquisition.
Split into simpler sentences: At the time, she had said that after these efforts stopped Genie's ungrammatical sentences ceased. However, he noted that in a 1981 paper she used many of these utterances to demonstrate Genie's lack of overall grammar acquisition.