Who is Taylor Swift's frequent collaborator and close friend known for producing her albums since 'Red'?

Jack Antonoff

In "Tarzan", who discovers Tarzan as a baby first? In rugby league, how many players are on each team? What trophy is awarded annually to the NHL goaltender allowing the fewest goals? Who crowned Charlemagne as Emperor in 800 CE? What type of springtime vegetable often symbolizes emerging new life during Easter?