When I was a student at Fuller Seminary in the early 1970s, I had the privilege of taking a class on the history of revivals from Dr. J. Edwin Orr. At the time, Dr. Orr was well into his 70s and certainly knew more than any man alive about what the Spirit of God had done in periods of revival throughout history.
What I didn't know until a few days ago was how instrumental he was in a revival that occurred 40 years before in Belfast, Ireland in 1934. This grew out of Orr and one other man praying what we would now call the 10:2b Prayer (ie, they were praying for "laborers"). Take a look at the video below and notice the very specific requests (which grew out of listening to God) that these two men (a CO2?) were making.
What city are you praying for? Who is your 10:2b prayer partner? What specific requests has God put on your heart?