[Q]: The Portezuelo Formation is a geologic formation outcropping in the Mendoza, Rio Negro and Neuquen provinces of Argentina. It is the fourth-oldest formation in the Neuquen Group and the older of the two formations in the Rio Neuquen Subgroup. Formerly, that subgroup was treated as a formation, and the Portezuelo Formation was known as the Portezuelo Member. Portezuelo Formation was not discovered by Argentinians. OPTIONS:
- Yes
- It's impossible to say
- No
[A]: It's impossible to say

[Q]: Mars Audiac Quintet is the third album by the band Stereolab, released in August 1994. Initial releases of the CD came with bonus two-track disk, the double vinyl album came with a 7". During the recording of the album, guitarist Sean O'Hagan left as a full-time member to form his own group, while keyboardist Katharine Gifford was added. Mars Audiac Quintet was released in the eighth month. OPTIONS:
- Yes
- It's impossible to say
- No
[A]: Yes

[Q]: The 8.8 cm Flak 18/36/37/41 (commonly called the eighty-eight) was a German 88 mm anti-aircraft and anti-tank artillery gun from World War II. It was widely used by Germany throughout the war, and was one of the most recognized German weapons of that conflict. Development of the original model led to a wide variety of guns. Germany fought in the second world war. OPTIONS:
- Yes
- It's impossible to say
- No
[A]: Yes

[Q]: Helvering v. Horst, 311 U.S. 112 (1940) , is an opinion of the United States Supreme Court which further developed the "fruit-and-tree" metaphor established in "Lucas v. Earl", 281 U.S. 111 (1930) . "Horst" is the leading case that applies the assignment of income doctrine to income from property. Helvering v. Horst, 311 U.S. 112 (1940) has a connection with "Lucas v. Earl", 281 U.S. 111 (1930) . OPTIONS:
- Yes
- It's impossible to say
- No
[A]:
Yes