Misc: What did Mary Poppins say helped the medicine go down?

Questions

Which musical instrument does Bill Clinton play?

By what name was Indian political leader Mohandas Gandhi better known?

What was the slogan of Martin Luther King's famous speech made in 1963 in which he looked forward to understanding between races?

Which African leader emerged from prison after 27 years to lead his party again?

Which President of the Soviet Union died in 1953, aged 73?