Does the sentence "It is in this period that the Longquan kilns declined, to be eventually replaced in popularity and ceramic production by the kilns of Jingdezhen in Jiangxi." provide a valid answer to the question "What kilns were Longquan kilns replaced by in popularity and production?"

A: yes

Does the sentence "The nation is also a notable producer of tin, tungsten and uranium." provide a valid answer to the question "What mineral is Portugal ranked as a leading European producer of?"

A: no

Does the sentence "Free and fair elections were finally held on 12 June 1993, with a presidential victory for Moshood Kashimawo Olawale Abiola." provide a valid answer to the question "When did Nigeria finally hold a fair election?"

A: yes

Does the sentence "In the Southern Russian dialects, instances of unstressed /e/ and /a/" provide a valid answer to the question "What does Southern Russian have a linguistic continuum with?"

A:
no