Problem:
Read the following paragraph and determine if the hypothesis is true:

Operation Zahnarzt (literally "Dentist") was a plan by the Germans to eliminate the Third Army during World War II. The plan of Operation Zahnarzt was to immediately come after Operation Nordwind. The plan was to initiate a pincer movement to encircle and destroy the 3rd US Army.

OPTIONS:
- Yes
- It's impossible to say
- No
Hypothesis: Operation Zahnarzt (literally "Dentist") was a plan by the Germans during the war.
****
Answer:
Yes

Problem:
Read the following paragraph and determine if the hypothesis is true:

Acanthosicyos is a genus of thorny shrubs of the botanical family Cucurbitaceae, subfamily Cucurbitoideae. The genus name derives from the Greek words ""akantha"" for thorn and ""sykios"" for cucumber or gourd. Endemic to the Namib Desert in Africa, this genus is represented by two known species including "Acanthosicyos horridus", the nara melon, an important food plant in its native range.

OPTIONS:
- Yes
- It's impossible to say
- No
Hypothesis: Acanthosicyos is represented by three known species.
****
Answer:
No

Problem:
Read the following paragraph and determine if the hypothesis is true:

Carl Andreas Koefoed (known in Russian as , "Andrey Andreyevich Kofod"; 16 October 1855, Skanderborg, Denmark 7 February 1948, Copenhagen) was a Danish agronomist active in the Russian Empire in the early 20th century. He was the brother of Danish chemist Emil Koefoed.

OPTIONS:
- Yes
- It's impossible to say
- No
Hypothesis: He was born in 1852
****
Answer:
No