input: Dairy cattle

To maintain lactation, a dairy cow must be bred and produce calves. Depending on market conditions, the cow may be bred with a ''dairy bull'' or a ''beef bull.'' Female calves (heifers) with dairy breeding may be kept as replacement cows for the dairy herd. If a replacement cow turns out to be a substandard producer of milk, she then goes to market and can be slaughtered for beef. Male calves can either be used later as a breeding bull or sold and used for veal or beef. Dairy farmers usually begin breeding or artificially inseminating heifers around 13 months of age. A cow's gestation period is approximately nine months. Newborn calves are removed from their mothers quickly, usually within three days, as the mother/calf bond intensifies over time and delayed separation can cause extreme stress on both cow and calf.

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do cows have to be impregnated to produce milk
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output: yes
Question: Free and membrane-bound ribosomes differ only in their spatial distribution; they are identical in structure. Whether the ribosome exists in a free or membrane-bound state depends on the presence of an ER-targeting signal sequence on the protein being synthesized, so an individual ribosome might be membrane-bound when it is making one protein, but free in the cytosol when it makes another protein. are free ribosomes and membrane bound ribosomes identical

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Answer: yes
IN: DSLRs became affordable around the mid-1990s, and have become extremely popular in recent years. Some manufacturers, for example Minolta, Canon and Nikon, chose to make their DSLRs 100% compatible with their existing SLR lenses in the beginning, allowing owners of new DSLRs to continue to use their existing lenses and get a longer lifespan from their investment. Others, for example Olympus, chose to create a completely new lens mount and series of lenses for their DSLRs. The Pentax SLR camera K-mount system is backward compatible to all previous lens generations from Pentax, including the latest digital SLRs like the K-3 and K-50. A Pentax K-mount lens from the early 70s can be used on the newest Pentax DSLR although it may not provide features that are included in newer lenses (e.g. autofocus). There are a few exceptions from the MZ and ZX series of Pentax film cameras that do not work with some of the older lenses.
do all dslr lenses fit all dslr cameras?

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OUT: no
What's the best answer to this question: do i need to provide id to police?

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Answer: no
Text: Although postal codes are usually assigned to geographical areas, special codes are sometimes assigned to individual addresses or to institutions that receive large volumes of mail, such as government agencies and large commercial companies. One example is the French CEDEX system.

Question: can two houses have the same postal code?

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Answer: yes
Text: Barcelona were expected to line up in a 4--2--3--1 formation, with Ronaldinho, Ludovic Giuly and Deco supporting Samuel Eto'o who would be deployed as the lone striker. They had doubts about the fitness of Lionel Messi going into the final. He had pulled a thigh muscle during the second leg of their match with Chelsea, and had not played since, though he was included in the 22 man squad for the final. Barcelona coach Frank Rijkaard stated he would leave it late before deciding whether to select him. Despite being included in the squad Messi did not feature in the final. Arsenal were expected to line up in a 4--5--1 formation, with Thierry Henry as the sole striker. There was much discussion about whether Jose Antonio Reyes would take the place of Robert Pires on the left of midfield. It had been announced before the match that this would be Pires' last match as he had agreed to join Villarreal next season.

Question: did messi play in 2006 champions league final?

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Answer:
no