Does "Calculating the day of the week is not very simple, because of the irregularities in the Gregorian system." contain the correct answer to "Why is calculating the days of the Gregorian calendar not simple?"

A: yes

Does "Many objects such as people, vehicle engines, and aircraft generate and retain heat, and as such, are especially visible in the infrared wavelengths of light compared to objects in the background." contain the correct answer to "Along with aircraft and people, what objects notably create and retain heat?"

A: yes

Does "In 2015, she surpassed the reign of her great-great-grandmother, Queen Victoria, to become the longest-reigning British head of state and the longest-reigning queen regnant in world history." contain the correct answer to "How is Victoria related to Elizabeth?"

A:
yes