Consider the following castes:
- Ali has a house in Tehran. John has a house in Paris.
- Ali has two houses in Tehran. John has two houses in Paris.
- Ali and John share a house in Paris.
- Ali and John share two houses in Paris.
Which of the following sentences could follow each of above sentences:
- Their house is big.
- Their houses are big.
Similarly, what does this sentence implies: "Their cars are clean": Each one has one or more cars or there are some cars that belonged to all.