story: One time, my friend showed me his really cool telescope. We looked at planets and stars at night. I saw him a few days later and asked if I could look through it again. He told me that he sold it to a friend. I was disappointed, but I found out my parents bought it for me.
 selected sentence: I was disappointed, but I found out my parents bought it for me.
I find out my parents buy me the telescope >Causes/Enables> I thank my parents