Problem: Does "European colonialism in the Sahara began in the 19th century." answer the question "What country conquered the Algiers from the Ottomans in 1830?"

A: no

Problem: Does "On July 9, 1775 a Cavalry Regiment was created in the state of Minas Gerais for maintaining law and order." answer the question "When did Minas Gerais get a cavalry regiment?"

A: yes

Problem: Does "A year later, IBM unveiled Project Big Green, a re-direction of $1 billion per year across its businesses to increase energy efficiency." answer the question "Secure Blue was launched in what year?"

A:
no