I will assume that "found sentences" actually refers to "compound sentences".
Answer:
My family and I went to Brazil for the summer holidays. We stayed at a hotel in Rio de Janeiro, and we had a great time. We weren’t able go to the beach on the first couple of days because it was raining. When the rain stopped, however, we couldn’t have enough of the beautiful ocean and light-colored sand. At the beach, there are some “barracas” selling fresh shrimps, but we had to buy them sneakily. Since my father is allergic, we did not want to tempt him into having some as well. I tried to learn how to surf, but it is harder than I had imagined. I hope to go back in the future.
Step-by-step explanation:
A complex sentence is formed by joining an independent clause and a dependent one. A dependent clause needs the independent one to give it context, so that it makes sense. It does not express a complete thought on its own. The dependent clause is set off by a subordinating conjunction (since, because, when, etc.) The complex sentences in the answer above are all underlined.
A compound sentence is formed by joining two independent clauses connected by a coordinating conjunction - for, and, nor, but, or, yet, so. The compound sentences int he answer above are all in bold.