Does the sentence "The data manipulation is done by dBASE instead of by the user, so the user can concentrate on what he is doing, rather than having to mess with the dirty details of opening, reading, and closing files, and managing space allocation." provide a valid answer to the question "Why was dBASE unique?"

A: yes

Does the sentence "NASA at first intended to launch one more mission, extending the spacecraft's endurance to three days, but since this would not beat the Soviet record, it was decided instead to concentrate on developing Project Gemini." provide a valid answer to the question "How many more Mercury missions were there after John Glenn's?"

A: no

Does the sentence "In March 2008, it was announced that Avicenna's name would be used for new Directories of education institutions for health care professionals, worldwide." provide a valid answer to the question "When was it announced that Avicenna would have medical directories named after him?"

A: yes

Does the sentence "The first modern analog computer was a tide-predicting machine, invented by Sir William Thomson in 1872." provide a valid answer to the question "James Thomson was the brother of what famous figure?"

A:
no