Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.

[EX Q]: Context: Edmund Crouchback (16 January 1245 -- 5 June 1296), a member of the House of Plantagenet, was the second surviving son of Henry III of England and Eleanor of Provence. 
 Question: What was the noble family that Edmund Crouchback was from?
[EX A]: house of plantagenet

[EX Q]: Context: Chronic lymphocytic leukemia (CLL) cells depend on microenvironmental factors for proliferation and survival. In particular, the B-cell receptor (BCR) and nuclear factor- B (NF-B) pathways are activated in the lymph node (LN) microenvironment. Thus, model systems mimicking tumor-host interactions are important tools to study CLL biology and pathogenesis. We investigated whether the recently established NOD/scid/c(null) (NSG) mouse xenograft model can recapitulate the effects of the human microenvironment. We assessed, therefore, tumor characteristics previously defined in LN-resident CLL cells, including proliferation, and activation of the BCR and NF-B pathways. We found that the murine spleen (SP) microenvironment supported CLL cell proliferation and activation to a similar degree than the human LN, including induction of BCR and NF-B signaling in the xenografted cells. Next, we used this model to study ibrutinib, a Bruton's tyrosine kinase inhibitor in clinical development. Ibrutinib inhibited BCR and NF-B signaling induced by the microenvironment, decreased proliferation, induced apoptosis and reduced the tumor burden in vivo. Thus, our data demonstrate that the SP of xenografted NSG mice can, in part, recapitulate the role of the human LN for CLL cells. In addition, we show that ibrutinib effectively disrupts tumor-host interactions essential for CLL cell proliferation and survival in vivo. 
 Question: What is the name of Bruton's tyrosine kinase inhibitor that can be used for treatment of chronic lymphocytic leukemia?
[EX A]: ibrutinib

[EX Q]: Context: The Raiders travelled to face the San Diego Chargers with a chance to secure their first playoff bid since 2002. In a stadium at least half full of Raider fans, the Chargers took an early lead on a pass from Philip Rivers to Travis Benjamin to put the Chargers up 7-0. The Raiders responded with an 11-play drive that stalled on the Charger 27-yard line and had to settle for a Sebastian Janikowski field goal to narrow the lead to 7-3. Neither team could muster anything offensively for the remainder of the quarter. A promising Raider drive to the Charger 16-yard line stalled again as Derek Carr was intercepted inside the 10-yard line. A Charger field goal following a 14-play drive put the Chargers up 10-3 with 1:33 left in the half. The Raider offense switched to their two-minute offense and cruised down the field before Carr hit Michael Crabtree in the corner of the end zone to tie the game at 10. The Raider offense drove deep into San Diego territory to open the second half, but had to settle for another Janikowski field goal to take the lead 13-10. The Chargers answered with a Rivers seven-yard touchdown pass to Hunter Henry to retake the lead. A missed extra point left the lead at 16-13. The remainder of the third quarter saw the offenses accomplish little before Charger running back Kenneth Farrow fumbled at the San Diego 14 early in the fourth quarter. The Raiders offense could not take advantage of the turnover and settled for Jankowski's third field of the game to tie it at 16. The Raider defense again stopped the Chargers and the offense, lead by Latavius Murray and Jalen Richard, moved the ball into San Diego territory again. For the fourth time, the offense settled for a Janikowski field goal to take the lead 19-16 with 3:47 remaining. On the ensuing San Diego possession, Rivers was intercepted by Reggie Nelson to allow the Raiders to take over and run out the clock. The win gave the Raiders their first playoff appearance since 2002. With a loss earlier in the day by Kansas City, the Raiders also took back first place in the AFC West. 
 Question: How caught the only Raiders touchdown?
[EX A]:
michael crabtree