Instructions: In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.
Input: Passage: Out of the four theaters included in plan H-1, of March 1930, the city only approved the construction of two; and thus, only these two theaters were constructed. Samuel "Roxy" Rothafel, a successful theater operator who was renowned for his dominance of the city's theater industry, joined the center's advisory board in 1930. He offered to build two theaters: a large, vaudeville "International Music Hall", on the northernmost block, with more than 6,200 seats; and the smaller, 3,500-seat "RKO Roxy" movie theater on the southernmost block. The idea for these theaters was inspired by Roxy's failed expansion of the 5,920-seat Roxy Theatre on 50th Street, one-and-a-half blocks away. Roxy also envisioned an elevated promenade between the two theaters, but this was never published in any of the official blueprints. Meanwhile, proposals for a Metropolitan Opera House on the site persisted. Official plans for a facility to the east of the RKO Roxy were filed in April 1932; the projected 4,042-seat opera facility would contain features such as a second-floor esplanade extending across 50th Street. However, the Met was unable to fund such a move, so the proposed new opera house was relegated to tentative status.In September 1931, a group of NBC managers and architects toured Europe to find performers and look at theater designs. However, the group did not find any significant architectural details that they could use in the Radio City theaters. In any case, Roxy's friend Peter B. Clark turned out to have much more innovative designs for the proposed theaters than the Europeans did. The Music Hall was designed by architect Edward Durell Stone and interior designer Donald Deskey in the Art Deco style. Eugene Schoen was selected to design the RKO Roxy.
Output:
What is the last name of the person who offered to build two theaters?