Look for explicit premises. List premises first, then conclusion. Make simple sentences if possible. The more complicated example exhibited more complex structure, with sub-arguments within the main argument. There are three kinds of argument structure, which we can diagram in the following ways.
Sequential structure is present in arguments where a single premise supports a conclusion.
Converging structure is present in arguments where several premises independently support the same conclusion. Linking structure is present in arguments where two or more premises jointly support the same conclusion. In this kind of situation, no premise supports the conclusion alone, only when all the premises are together is the conclusion warranted. They will usually appear at the beginning or the end, however. Conclusions can even be missing, or implicit.