Why are we allowed to use を particle with na-adjectives?

Question

Can someone explain the usage of a _na_-adjective with the を particle? I cannot understand why we can say > ほうれん草を嫌いな人もいる。 because I'd thought that it had to be a が or の particle instead of an を. Also, why can we say > きみがなぜジャズを嫌いか私にはわからない。 Shouldn't it be きみがなぜジャズが嫌いか私にはわからない? (Source: [tatoeba.org](http://tatoeba.org/eng/sentences/search?query=%E3%82%92%E5%AB%8C%E3%81%84&from=und&to=und))

Answer 1

There are some occasions where using GA would lead to multiple grammatical subjects in a sentence. To remove any confusion the particles NO and WO are sometimes used in the subordinate clauses.

WO may be used to show the relationship of words (an object) in this case.