Controlling yellow fever greatly aided the completion of which large Central American project in 1914?

Which Lewis Carroll character says, "Contrariwise, if it was so, it might be; and if it were so, it would be; but as it… Contrary to its name, which yellow mustard brand, introduced in 1904, is American? Contrary to popular belief, Humphrey Bogart never says "Play it again, Sam" in which 1942 film? Control of which Caribbean island was a central concern of the Spanish-American War? Which controversial conductor led the Berlin Philharmonic for decades and died in July 1989? Controversial even when serialized in The National Era, which novel sold about 300,000 copies in book form in 1852? A 2003 ruling to remove a monument from an Alabama judicial building sparked controversy. What did the monument feature? What word means conversation marked by quick, witty replies?