story: One time, Papa decided to take the family to the mountains. The kids sat in the back of the old army truck for hours. They set up camp and collected firewood. Tom went exploring and heard a big, loud roaring sound nearby. Thinking it was a lion, he sneaked away and saw was a bobcat!
 selected sentence: Tom went exploring and heard a big, loud roaring sound nearby.
Tom hears the sound >Causes/Enables> Tom looks toward the sound