Today's daf is sponsored in memory of Helen Glucksman, Chana Rachel bat Moshe Aharon Halevi z"l, beloved grandmother of our teacher, Lisa Septimus, from Malkie, Marcy, Rochelle, Sami and Gitta.  When a non-Jew performs an act that a Jew is forbidden to do on Shabbat, can a Jew benefit from what the non-Jew did? On what does it depend? Is it only for a candle or items like that as one candle can be used for many people? Does it depend on whether the non-Jew knows the Jew? Can one carry an item that is generally used for forbidden purposes for its own sake (if one needs it for a permitted purpose)? If a door breaks on Shabbat or before Shabbat, can it be carried? Can one put it back in its place? Is there a difference between a door that is serving something that is attached to the ground or a door of a utensil? Why? Does the melacha of building include building utensils or not?