Input: Article: Sleep involves great changes in brain activity. Until the 1950s it was generally believed that the brain essentially shuts off during sleep, but this is now known to be far from true; activity continues, but patterns become very different. There are two types of sleep: REM sleep (with dreaming) and NREM (non-REM, usually without dreaming) sleep, which repeat in slightly varying patterns throughout a sleep episode. Three broad types of distinct brain activity patterns can be measured: REM, light NREM and deep NREM. During deep NREM sleep, also called slow wave sleep, activity in the cortex takes the form of large synchronized waves, whereas in the waking state it is noisy and desynchronized. Levels of the neurotransmitters norepinephrine and serotonin drop during slow wave sleep, and fall almost to zero during REM sleep; levels of acetylcholine show the reverse pattern.

Now answer this question: During what stage of sleep do serotonin and norepinephrine levels drop?

Output: slow wave sleep

Input: Article: Filming started in Austria in December 2014, with production taking in the area around Soldenincluding the Otztal Glacier Road, Rettenbach glacier and the adjacent ski resort and cable car stationand Obertilliach and Lake Altaussee, before concluding in February 2015. Scenes filmed in Austria centred on the Ice Q Restaurant, standing in for the fictional Hoffler Klinik, a private medical clinic in the Austrian Alps. Filming included an action scene featuring a Land Rover Defender Bigfoot and a Range Rover Sport. Production was temporarily halted first by an injury to Craig, who sprained his knee whilst shooting a fight scene, and later by an accident involving a filming vehicle that saw three crew members injured, at least one of them seriously.

Now answer this question: Where was the Hoffler Klinik supposed to be located?

Output: Austrian Alps.

Input: Article: Soon after, a Russian cavalry movement was countered by the Heavy Brigade, who charged and fought hand-to-hand until the Russians retreated. This caused a more widespread Russian retreat, including a number of their artillery units. When the local commanders failed to take advantage of the retreat, Lord Raglan sent out orders to move up. The local commanders ignored the demands, leading to the British aide-de-camp personally delivering a quickly written and confusing order to attack the artillery. When the Earl of Cardigan questioned what they referred to, the aide-de-camp pointed to the first Russian battery he could see the wrong one.

Now answer this question: Who failed to take advantage of the retreat?

Output:
local commanders