Input: Read this: Bell's own home used a primitive form of air conditioning, in which fans blew currents of air across great blocks of ice. He also anticipated modern concerns with fuel shortages and industrial pollution. Methane gas, he reasoned, could be produced from the waste of farms and factories. At his Canadian estate in Nova Scotia, he experimented with composting toilets and devices to capture water from the atmosphere. In a magazine interview published shortly before his death, he reflected on the possibility of using solar panels to heat houses.
Question: What kind of toilet did Bell work on?

Output: composting

Input: Read this: Copper's greater conductivity versus other metals enhances the electrical energy efficiency of motors. This is important because motors and motor-driven systems account for 43%-46% of all global electricity consumption and 69% of all electricity used by industry. Increasing the mass and cross section of copper in a coil increases the electrical energy efficiency of the motor. Copper motor rotors, a new technology designed for motor applications where energy savings are prime design objectives, are enabling general-purpose induction motors to meet and exceed National Electrical Manufacturers Association (NEMA) premium efficiency standards.
Question: What property of copper ruins the efficiency of electrical motors?

Output: unanswerable

Input: Read this: Eritrea is a member of the United Nations, the African Union, and is an observing member of the Arab League. The nation holds a seat on the United Nations' Advisory Committee on Administrative and Budgetary Questions (ACABQ). Eritrea also holds memberships in the International Bank for Reconstruction and Development, International Finance Corporation, International Criminal Police Organization (INTERPOL), Non-Aligned Movement, Organization for the Prohibition of Chemical Weapons, Permanent Court of Arbitration, and the World Customs Organization.
Question: What is the acronym for the International Bank for Reconstruction and Development?

Output: unanswerable

Input: Read this: According to historian Shaye J. D. Cohen, the status of the offspring of mixed marriages was determined patrilineally in the Bible. He brings two likely explanations for the change in Mishnaic times: first, the Mishnah may have been applying the same logic to mixed marriages as it had applied to other mixtures (Kil'ayim). Thus, a mixed marriage is forbidden as is the union of a horse and a donkey, and in both unions the offspring are judged matrilineally. Second, the Tannaim may have been influenced by Roman law, which dictated that when a parent could not contract a legal marriage, offspring would follow the mother.
Question: What dictated that when a parent could not contract a legal marriage, offspring would follow the father?

Output:
unanswerable