Can you be more than one thing?

"Can you be more than one thing?" asked Benjamin.

"What do you mean?" I asked. His three other siblings were finally asleep, and the two of us were snuggling in my bed.

"I mean, like, an astronaut, but also a singer, and also..."

"Oh, yes!" I exclaimed. "There's a Canadian astronaut who was also a singer, and also he wrote a book for grown-ups, and also a …