Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.

Example Input: The TNF family member receptor activator for NF-B ligand (RANKL) and its receptors RANK and osteoprotegerin are key regulators of bone remodeling but also influence cellular functions of tumor and immune effector cells. In this work, we studied the involvement of RANK-RANKL interaction in NK cell-mediated immunosurveillance of acute myeloid leukemia (AML). Substantial levels of RANKL were found to be expressed on leukemia cells in 53 of 78 (68%) investigated patients. Signaling via RANKL into the leukemia cells stimulated their metabolic activity and induced the release of cytokines involved in AML pathophysiology. In addition, the immunomodulatory factors released by AML cells upon RANKL signaling impaired the anti-leukemia reactivity of NK cells and induced RANK expression, and NK cells of AML patients displayed significantly upregulated RANK expression compared with healthy controls. Treatment of AML cells with the clinically available RANKL Ab Denosumab resulted in enhanced NK cell anti-leukemia reactivity. This was due to both blockade of the release of NK-inhibitory factors by AML cells and prevention of RANK signaling into NK cells. The latter was found to directly impair NK anti-leukemia reactivity with a more pronounced effect on IFN- production compared with cytotoxicity. Together, our data unravel a previously unknown function of the RANK-RANKL molecule system in AML pathophysiology as well as NK cell function and suggest that neutralization of RANKL with therapeutic Abs may serve to reinforce NK cell reactivity in leukemia patients.
Example Output: To the ligand of which receptors does Denosumab (Prolia) bind?

Example Input: Hermann Friedrich Kohlbrugge, or Kohlbrugge (August 15, 1803, Amsterdam - March 5, 1875, Elberfeld) was a Dutch (German father) minister.
Example Output: Where did Hermann Friedrich Kohlbrugge live when he died?

Example Input: Coming off a primetime victory over Cincinnati, the Colts flew to Reliant Stadium for an AFC South rematch with the Houston Texans. Heading into this game, Indianapolis had never lost a game to the Texans, winning their first 9 games against them. In the first quarter, the Colts got an early shock as RB Ron Dayne ran for a 3-yard touchdown and a 6-yard touchdown run. Indianapolis would respond with 37-yard touchdown pass from QB Peyton Manning to WR Marvin Harrison. In the second quarter, the Colts tied the game with Manning completing a 9-yard touchdown pass to WR Aaron Moorehead. However, Houston reclaimed its lead with QB David Carr's 3-yard touchdown pass to RB Vonta Leach. In the third quarter, Indianapolis crept closer with K Adam Vinatieri making a 33-yard field goal for the only score of the period. In the fourth quarter, the Texans responded with kicker Kris Brown's 42-yard field goal. Afterwards, the Colts tied the game with Manning hooking up with Harrison again on a 7-yard touchdown pass, Harrison's second of the game. However, Houston managed to pull off a huge upset with Kris Brown's game-winning 48-yard field goal as time expired, giving Indianapolis their first ever loss against them. With the loss, the Colts fell to 11-4. Colts QB Peyton Manning finished the game 21 of 27 for 205 yards passing with three touchdowns and Texans QB David Carr finished with 163 passing yards on completing 16 of 23 passes with one touchdown. Rookie RB Joseph Addai ran the ball 15 times for 100 yards and former Heisman Trophy winner Ron Dayne finished the game with 153 rushing yards on 32 carries. After this game, the Colts were now 11-4, having lost 4 of 6 after a 9-0 start and dropped to 4-4 on the road.
Example Output:
Which team was in the lead in the second quarter?