Given the task definition and input, reply with output. 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.

proper question: What are examples of economic actors? 
 disfluent question: What philosophy, uh stop  tell me what are examples of economic actors? 
 context: Neoclassical economics views inequalities in the distribution of income as arising from differences in value added by labor, capital and land. Within labor income distribution is due to differences in value added by different classifications of workers. In this perspective, wages and profits are determined by the marginal value added of each economic actor (worker, capitalist/business owner, landlord). Thus, in a market economy, inequality is a reflection of the productivity gap between highly-paid professions and lower-paid professions.

worker, capitalist/business owner, landlord