Does the sentence "During this period the other major ruling families of the Deccan, the Hoysalas, the Seuna Yadavas of Devagiri, the Kakatiya dynasty and the Southern Kalachuri, were subordinates of the Western Chalukyas and gained their independence only when the power of the Chalukya waned during the later half of the 12th century." provide a valid answer to the question "Besides the language of Kannada, what other old language was used during the western Chalukya dynasty?"

A: no

Does the sentence "During the September 11, 2001 attacks on the World Trade Center, FBI agent Leonard W. Hatton Jr. was killed during the rescue effort while helping the rescue personnel evacuate the occupants of the South Tower and stayed when it collapsed." provide a valid answer to the question "What tower was Leonard W. Hatton Jr attempting to evacuate?"

A: yes

Does the sentence "World Trade Center 4, with 40 floors and 53,500 square metres (576,000 sq ft) of space is under construction as of 2010[update].[citation needed]" provide a valid answer to the question "How much space is World Trade Center 4 projected to have?"

A: yes

Does the sentence "The inventor Anton Freissler developed the ideas of von Siemens and built up a successful enterprise in Austria-Hungary." provide a valid answer to the question "Who ultilized von Siemens ideas to build a succesful business?"

A:
yes