Q: Does "The same system was used for Milan's earliest underground line, Milan Metro's line 1, whose more recent lines use an overhead catenary or a third rail." provide a valid answer to "Where was the system similar to London Underground used as well?"?
A: yes

Q: Does "After Germany invaded the Soviet Union on 22 June 1941, the Wehrmacht crossed the Estonian southern border on 7 July." provide a valid answer to "When did the Werhmacht cross the south border of Estonia?"?
A: yes

Q: Does "Net profit margin rose from 4.2% in 1999 to 8.4% in 2009, with operating margins improving 31 percent and return on equity doubling to 6.7 percent in the same time span." provide a valid answer to "What was Comcast's profit margin in 2009?"?
A: yes

Q: Does "The Britishwho set up a trading post in the west coast port of Surat in 1619and the French." provide a valid answer to "In what country was the trading base for the Dutch?"?
A:
no