You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "thorns on plants is a feature of trees in?" whose answer is tropical Africa.
Each document should contain about 30 words, and these documents should contain useful information.

Query: thorns on trees vs shrubs
Useful Output:

Doc 1: Many bushes, shrubs, and scrub trees have thorns. Some examples are rose, multiflora rose, blackberry, and raspberry bushes. If you have to
Doc 2: Careful nurturing is required to ensure that the “productivity potential” of each and every plant including “the weeds” is fully harnessed and realised.
Doc 3: Spinescent is a term that describes plants that bear sharp structures that deter herbivory. Thorns, spines and prickles are mechanical defences
Doc 4: Japanese Barberry · English Hawthorn · Candy Oh Rose · Rainbow Knockout Rose · Blushing Knockout Rose · Beach Rose · At Last Rose · Red Flower Carpet
Doc 5: It turns out that spines are derived from leaf tissue and thorns from stem tissue. Prickles come from neither; they are simply corky projections