Complex sentence exploration : wh- noun clauses

I'm finding it hard to forget Hakan's "it's a mystery; why?", but in class we produced some good examples of wh- noun clauses like "It's a mystery why nobody likes English food" and "Everybody knows who won the women's world cup this year".  Look at the following examples students found in their reading texts, and leave a comment if you think any are NOT good examples of wh- noun clauses:

1. Most of the problems organizations face today when designing and implementing online strategies stem from trying to fit everything into existing structures and models.
2. The assembly decides to investigate at national and European level what obstacles currently exist to the nomination of women candidates, what measures could be taken to encourage female applicants, and to consider setting targets for achieving greater gender equality in the composition of the court.
3. Empirical data on how these camps affect…
4. The primary issue for the Grand Chamber was whether the questions posed were within its Advisory Opinion jurisdiction
5. The participants were male and non-native speakers of English, two of whom had a BA degree and one had an MA degree in TEFL.