Dana Farber and Beth Israel are affiliated with one another and located next to each other, so the oncologist may be at Dana Farber while the surgeon could be at Beth Israel. I think doctors often have teams they work with for particular types of treatments.
Da Vinci robotics are a method of robotic surgery they use, so it a is very precise and less invasive method of surgery. Believe it was originally used with prostate surgery but it's uses are being expanded and include esophageal surgery now. I would guess only certain people are candidates for this method. You can locate info online on davinci procedures since I know I have seen websites listed for them in some of my medical language and coding classes. Think several people have mentioned having davinci surgery done in California.