Hey Beulah,
There are two choices you can make here. You can either, do what I would do, and simply ask the original posters (OPs) if you may take their postings to use for your own learning. It's quite simple and respectful, and quite easy for you, which is an important point, right?

Anyway, if you're really worried, you could ask the moderators, they should be able to come to a decision on these matters
