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

[Q]: Precursor cells have been shown to be affected by oxidative stress, in vivo and vitro, but little is known about the expression of antioxidant mechanisms in neuronal/glial differentiation. We have characterized the expression of Cu/Zn superoxide dismutase (Cu/Zn SOD), one of the main antioxidant proteins involved in the breakdown of superoxide, in the immature rat dorsolateral subventricular zone (SVZ), rostral migratory stream (RMS) and hippocampal subgranular zone (SGZ). Progenitor cells were identified immunohistochemically on cryostat sections by 5'Bromodeoxyuridine (BrdU) incorporation and expressing cells were further characterized using double labeling for progenitor markers. In the SVZ, only a subpopulation of BrdU+ cells, mostly found in the medial SVZ, expressed Cu/Zn SOD. These cells were mostly nestin+ and some were also vimentin+. In contrast, in the lateral SVZ few Cu/Zn SOD+/BrdU+ cells were found. These were primarily nestin+, vimentin-, showed some PSA-NCAM expression, but only a few were NG2+. In the RMS and SGZ virtually all BrdU+ progenitors were Cu/Zn SOD+ and expressed nestin and vimentin. Some RMS cells were also PSA-NCAM+. These findings show a heterogeneous expression of Cu/Zn SOD in restricted cell types in the germinative zones and suggest a role for antioxidant Cu/Zn SOD in progenitor cells of the immature rat brain.
[A]: Which intermediate filament (IF) protein can be used as a non-specific marker of the neuronal precursor cells of the subventricular zone?


[Q]: MPEG-4 Part 14 is an instance of the more general ISO/IEC 14496-12:2004 (MPEG-4 Part 12: ISO base media file format) which is directly based upon the QuickTime File Format.
[A]: Which is the basis of MPEG-4 Part 14?


[Q]: The Steelers' ninth game was an AFC duel with the Patriots. The Steelers trailed early as QB Tom Brady made a 19-yard TD pass to TE Rob Gronkowski. This was followed by kicker Shayne Graham getting a 31-yard field goal. The Steelers responded in the second quarter with kicker Jeff Reed nailing a 22-yard field goal. The Steelers struggled further when Brady threw another TD pass to Gronkowski, this one from 9yards out. That was followed by Brady's scramble 3yards to the endzone for a touchdown (With a failed PAT as the kick went wide-right). The Steelers scored first in the 4th quarter when QB Ben Roethlisberger completed a 6-yard TD pass to WR Emmanuel Sanders. The Steelers looked to create another scoring drive, but it came to a halt when Roethlisberger's pass was intercepted by SS James Sanders and returned 32yards for a touchdown (With a failed 2-point conversion). The Steelers tried to cut the lead with a Roethlisberger 15-yard TD pass to WR Mike Wallace, but the Patriots replied with Brady getting a 25-yard TD pass to Gronkowski. Again the Steelers tried to get closer when Roethlisberger completed a 33-yard TD pass to Wallace, but the Patriots put the game away after Graham hit a 36-yard field goal.
[A]:
Who caught the first TD pass?