Use a disfluent question or a proper question and find the answer to the question based on the given context or return None if an answer can't be found. A disfluent question is a question that has some interruptions in it while framing. A proper question is the correct form of the question without any disfluency.

[EX Q]: proper question: What equation desribed the physics of force before the current Schrodinger equation? 
 disfluent question: What equation has consequence no the described the physics of force before the current Schrodinger equation? 
 context: The notion force keeps its meaning in quantum mechanics, though one is now dealing with operators instead of classical variables and though the physics is now described by the Schrödinger equation instead of Newtonian equations. This has the consequence that the results of a measurement are now sometimes quantized, i.e. they appear in discrete portions. This is, of course, difficult to imagine in the context of forces. However, the potentials V(x,y,z) or fields, from which the forces generally can be derived, are treated similar to classical position variables, i.e., .
[EX A]: Newtonian equations.

[EX Q]: proper question: Who refused Buyantu? 
 disfluent question: What did er who refused Buyantu? 
 context: The fourth Yuan emperor, Buyantu Khan (Ayurbarwada), was a competent emperor. He was the first Yuan emperor to actively support and adopt mainstream Chinese culture after the reign of Kublai, to the discontent of some Mongol elite. He had been mentored by Li Meng, a Confucian academic. He made many reforms, including the liquidation of the Department of State Affairs (Chinese: 尚書省), which resulted in the execution of five of the highest-ranking officials. Starting in 1313 the traditional imperial examinations were reintroduced for prospective officials, testing their knowledge on significant historical works. Also, he codified much of the law, as well as publishing or translating a number of Chinese books and works.
[EX A]: None

[EX Q]: proper question: When was the Bolelsaw Duchy reincorporated into the Polish Crown? 
 disfluent question: Who was er when was the Bolelsaw Duchy reincorporated into the Polish Crown? 
 context: The first fortified settlements on the site of today's Warsaw were located in Bródno (9th/10th century) and Jazdów (12th/13th century). After Jazdów was raided by nearby clans and dukes, a new similar settlement was established on the site of a small fishing village called Warszowa. The Prince of Płock, Bolesław II of Masovia, established this settlement, the modern-day Warsaw, in about 1300. In the beginning of the 14th century it became one of the seats of the Dukes of Masovia, becoming the official capital of Masovian Duchy in 1413. 14th-century Warsaw's economy rested on mostly crafts and trade. Upon the extinction of the local ducal line, the duchy was reincorporated into the Polish Crown in 1526.
[EX A]:
None

