Lyft, Pinterest, or Facebook (SWE intern)?

Looking for advice about which offer to take. I’m a junior studying CS, and I interned at Microsoft (on Azure) last summer. The Lyft and Pinterest offers are for SF whereas Facebook is for Menlo Park. They all do team matching later, I believe, so I won’t know exactly what I’d be working on though I’m interested in backend work. Which would you recommend taking in terms of culture, opportunities, interesting work, potential full time return offers?