music: who recorded the 1968 hit song "on the road again"?

Questions

the longest fence in the world was built to keep out ______?

who did the national enquirer offer 250,000 dollars to perform a human head transplant?

who offered dr christian barnard 250,000 dollars to perform a human head transplant?

how much was dr christian barnard offered to perform a human head transplant?

what word is used for playing all the notes in a chord one at a time?