Misc: Which metal is used for the element in the electric light?

Questions

Beatles Song: "I get by with a little help from my friends..."?

Beatles Song: "na na na na na na na na na na na na na hey hey hey _ _ _ _ !!"?

Beatles Song: "Nobody was really sure if he was from the House of Lords."?

Beatles Song: "She waits at the window hearing the face that she keeps in a jar by the door."?

Beatles Song: "Sitting in an English garden waiting for the sun."?