Green Tea Tiramisu

Hi, I am new here. I just received the latest recipe for Green Tea Tiramisu and don’t quite understand what they mean in the ingredients by “syrup”. Would it be a special syrup or corn syrup? And 4 pieces of yolk? Would that mean 4 egg yolks? Also, do you purchase the green tea cakes or am I misreading the instructions? Sorry, sounds kind of dumb!