Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.

[EX Q]: What did Slavic origin no Vrisovci own?
[EX A]: What did Vrisovci own?

[EX Q]: Who was the main detractor of the humoral theory of immunity, oh scratch that, I mean cellular theory?
[EX A]: Who was the main detractor of the cellular theory of immunity?

[EX Q]: What do common elements include in various no no often act as?
[EX A]:
What do common elements often act as?