In the roger federer biography, "quest for perfection", the author describes her first meeting with federer in what year?

The author met Roger Federer first time on September 11, 1996.

Explanation:

Mirka Federer the author of Quest for perfection and also the wife of Roger Federer. She shares her first encounter with him in the book when Roger was 15 years old and was on his way to achieve success as Best Swiss Tennis Player.

Mirka was also a professional player back then, and admired Roger for his passion and hard work towards the sport. The love for the same sport connected them and eventually they got hitched together. While writing the biography, Mirka becomes nostalgic through her description.

type of error:

the error in the sentence is a "dangling modifier". a dangling modifier is a phrase, word or clause that "dangles" because there is not target to modify. in this case, "after mopping the floor" is the dangling modifier since it has no word to modify. the noun "house" cannot mop the floor; therefore there is a mistake in the writing of the sentence.

i think it's either 'to expose the corruption of the communists in russia', or 'to criticize animal brutality by communists in russia.'  

hope this ! : )