Q: Does "German air attacks on the British Isles increased in 1915 and the AA efforts were deemed somewhat ineffective, so a Royal Navy gunnery expert, Admiral Sir Percy Scott, was appointed to make improvements, particularly an integrated AA defence for London." provide a valid answer to "What was used because of night attacks?"?
A: no

Q: Does "However, since the early 1980s, the reasons for Venezuelan emigration have changed to include hopes of earning a higher salary and due to the economic fluctuations in Venezuela which also promoted an important migration of Venezuelan professionals to the US." provide a valid answer to "Do Venezuelans still come to America for the same reasons as they did before?"?
A: yes

Q: Does "Nevertheless, he refused." provide a valid answer to "What did Eisenhower do when he was encouraged to respond to McCarthy's accusations?"?
A: yes

Q: Does "Two rounds of Soviet purges directed by Moscow (19271934 and 19371938) resulted in the expulsion of nearly 10,000 people, from all levels of the Communist Party of Tajikistan." provide a valid answer to "How many people were expelled??"?
A:
yes