context:  Justin Tucker made a 52-yard field goal with 5:08 left in overtime to give the Baltimore Ravens a 23-20 victory over the Pittsburgh Steelers on Thursday night. Tucker tied it with 3 seconds to go in regulation after Pittsburgh's Josh Scobee missed a pair of kicks that would have given the Steelers some cushion. Tucker then won it in the extra period after the Steelers failed to convert a pair of fourth downs in Baltimore territory. The Steelers defense had another stellar outing, sacking Joe Flacco five times and forcing two turnovers. Michael Vick threw for 124 yards and a score and avoided committing any turnovers while starting in place of the injured Ben Roethlisberger. All helped lead the team to a 20-7 lead early in the third quarter. However, the Steelers offense stalled after, and Baltimore took advantage dropping the team to 2-2. Antonio Brown's 5/50 receiving streak was broken after 35 consecutive games. He finished with 5 receptions, but missed the 50-yard mark by 8 yards.
question: How many points did the Raven's win by?
answer: 3