Misc: In 1885 Louis B Mayer, ---------- Russia, motion-picture executive (MGM), born. ?

Questions

In 1914 Dr. ---------- Salk, who made polio a fear of the past born?

In 1914 Dr. Jonas---------- , who made polio a fear of the past born ?

In 1914 Dr. Jonas Salk, who made ---------- a fear of the past born ?

In 1918 ---------- declares independence from Austria. ?

In 1918 Czechoslovakia declares independence from---------- . ?