Question: Who is the uncle of Susy Clemens?
Sentence (from "Susy Clemens"): Olivia Susan "Susy" Clemens (March 19, 1872 – August 18, 1896), was the second child and oldest daughter of Samuel Clemens, who wrote under the pen name Mark Twain, and his wife Olivia Langdon Clemens.
Relevant evidence: Yes