Problem: Does "In particular, these changes included a touch-optimized Windows shell based on Microsoft's "Metro" design language, the Start screen (which displays programs and dynamically updated content on a grid of tiles), a new platform for developing apps with an emphasis on touchscreen input, integration with online services (including the ability to sync apps and settings between devices), and Windows Store, an online store for downloading and purchasing new software." answer the question "Who are Windows main operating system competitors?"

A: no

Problem: Does "The figure of the "tragic octoroon" was a stock character of abolitionist literature: a mixed-race woman raised as if a white woman in her white father's household, until his bankruptcy or death has her reduced to a menial position She may even be unaware of her status before being reduced to victimization." answer the question "What story was written by Child in 1842?"

A: no

Problem: Does "Because medical research and development of drugs to treat such diseases is financially disadvantageous, companies that do so are rewarded with tax reductions, fee waivers, and market exclusivity on that drug for a limited time (seven years), regardless of whether the drug is protected by patents." answer the question "What is the length of time of market exclusivity of an orphan drug?"

A:
yes