"The fourth Canadian musician is also poor and old."
Translation:A negyedik kanadai zenész is szegény és idős.
Oh, I'm really sorry, I was a bit confused.
Then the explanation is, that "is" here refers to the noun and not the indicators. So the sentence means that there are at least one other person who is poor and old besides the musician. If you put "is" at the end of the sentence, then it means that there are other inicators that features the musician besides poor and old.