Context:
During the years between World War I and World War II, a great lesson was learned by our military leaders and the people of the United States. The lesson was that in the aftermath of World War I, we kind of turned our backs and left them to their own devices and they brewed up a lot of trouble that quickly became World War II.
Hypothesis: Them refers to Hitler
It's impossible to say
Context:
The Trip<br>Henry was a banker on Wall Street. He made very good money and worked hard for it. A couple times a year, he took a vacation. His favorite vacations were the ones he spent sailing with his son. They loved spending time together more than anything else.
Hypothesis: Henry's went on sailing vacations with his son.
Yes
Context:
Melted Chocolate<br>Julian was planning on giving his girlfriend some chocolate. When he went to get the box he realized it had melted. He tried to clean it up but it was no use. When his girlfriend saw she just giggled. She appreciated and thought he was cute for trying so hard.
Hypothesis: Julian is a teenager

It's impossible to say