['entailment']
He had heard or seen something that had affected him strongly, but what was it? 
הוא שמע או ראה משהו שהשפיע עליו מאוד, אבל מה זה היה? 
I was curious as to what it was that he saw that was upsetting.
הייתי סקרן לדעת מה הוא ראה שהיה מטריד. 