Based on the information present in the given passage, you need to write a correct answer to the given question. A correct answer is one that correctly and completely answers the question. Do not write answers that address the question partially or incorrectly. The correct answer must be contained in the given paragraph.

Example Input: Paragraph- Sent 1: Have you ever seen an egg?
Sent 2: Some animals do not have live births.
Sent 3: Instead, they lay eggs.
Sent 4: The eggs contain the embryo.
Sent 5: The embryo matures in the egg.
Sent 6: With time, it will hatch.
Sent 7: Some animals hatch and do not need care from their parents.
Sent 8: They are ready to live on their own.
Sent 9: Other animals will still need the care of their parents.
Sent 10: Sea turtles break out of their shells.
Sent 11: They immediately walk to the ocean.
Sent 12: They do this with no help from an adult.
Sent 13: Birds stay in the nest for many weeks.
Sent 14: They are cared for by their parents.
Sent 15: They leave the nest when they are strong enough to fly.
Sent 16: Some animals give birth to live offspring.
Sent 17: Animals like horses, cows, and whales give live birth.
Sent 18: Their offspring are born looking like mini adults.
Question: After hatching, how long do birds stay in their nests before leaving to learn to fly?.
Example Output: They are cared for by their parents.
Sent 15: They leave the nest when they are strong enough to fly.

Example Input: Paragraph- Sent 1: According to the radar reconstruction, American 77 reemerged as a primary target on Indianapolis Center radar scopes at 9:05, east of its last known position.
Sent 2: The target remained in Indianapolis Center's airspace for another six minutes, then crossed into the western portion of Washington Center's airspace at 9:10.
Sent 3: As Indianapolis Center continued searching for the aircraft, two managers and the controller responsible for American 77 looked to the west and southwest along the flight's projected path, not east-where the aircraft was now heading.
Sent 4: Managers did not instruct other controllers at Indianapolis Center to turn on their primary radar coverage to join in the search for American 77.
Sent 5: In sum, Indianapolis Center never saw Flight 77 turn around.
Sent 6: By the time it reappeared in primary radar coverage, controllers had either stopped looking for the aircraft because they thought it had crashed or were looking toward the west.
Sent 7: Although the Command Center learned Flight 77 was missing, neither it nor FAA headquarters issued an all points bulletin to surrounding centers to search for primary radar targets.
Sent 8: American 77 traveled undetected for 36 minutes on a course heading due east for Washington, D.C. By 9:25, FAA's Herndon Command Center and FAA headquarters knew two aircraft had crashed into the World Trade Center.
Sent 9: They knew American 77 was lost.
Sent 10: At least some FAA officials in Boston Center and the New England Region knew that a hijacker on board American 11 had said "we have some planes."Sent 11: Concerns over the safety of other aircraft began to mount.
Sent 12: A manager at the Herndon Command Center asked FAA headquarters if they wanted to order a "nationwide ground stop."Sent 13: While this was being discussed by executives at FAA headquarters, the Command Center ordered one at 9:25.
Sent 14: The Command Center kept looking for American 77.
Sent 15: At 9:21, it advised the Dulles terminal control facility, and Dulles urged its controllers to look for primary targets.
Sent 16: At 9:32, they found one.
Sent 17: Several of the Dulles controllers "observed a primary radar target tracking eastbound at a high rate of speed" and notified Reagan National Airport.
Sent 18: FAA personnel at both Reagan National and Dulles airports notified the Secret Service.
Question: At which times did all this take place.
Example Output: 9:10.

Example Input: Paragraph- Sent 1: Surviving being shot and stabbed at the end of the previous film , the stepfather has been institutionalized in Puget Sound , Washington since , spending his time building model houses in the workshop .
Sent 2: Assigned a new doctor named Joseph Danvers the stepfather begins confiding in him to gain his trust , ultimately murdering the doctor during a session by stabbing him in the neck with a blade smuggled out of the workshop .
Sent 3: After killing Danvers the stepfather beats a suspicious guard named Ralph Smith to death with his own nightstick with only two strikes and takes his uniform , successfully sneaking out of the sanitarium .
Sent 4: Checking into a hotel after robbing and murdering a traveling salesman the stepfather alters his appearance , takes the name Doctor Gene F. Clifford from the newspaper obituaries and travels to Palm Meadows , Los Angeles after seeing an ad for it on an episode of Dream House .
Sent 5: Gene arrives in Palm Meadows and meets real estate agent Carol Grayland and leases a house just across the street from her and her son Todd .
Sent 6: During a session with the wives of the neighborhood , Gene learns Carol 's dentist husband , Philip had absconded with his mistress the previous year .
Sent 7: Gene begins courting Carol , eventually winning over her and Todd .
Sent 8: Gene 's plan to marry Carol is soon complicated when Phil returns , wanting to reconcile with his wife .
Sent 9: Needing Phil out of the way , Gene persuades Carol to send Phil over for a meeting , during which Gene kills him with a broken bottle , covering up Phil 's disappearance afterward by arranging it so that it looks as though he simply ran off again .
Question: Aside from being doctors, what do Doctor Joseph Danvers and Doctor Gene F. Clifford have in common?.
Example Output:
They're both dead.