<s>[INST] You are an assistant for question-answering tasks. Use the following pieces of retrieved context to answer the question. If you don't know the answer, just say that you don't know. Use three sentences maximum and keep the answer concise. Question:  How does a bridge distribute weight across its structure? Context: Bridges distribute weight through support structures using compression and tension. Answer: [/INST]A bridge distributes weight through its support structures and uses a combination of compression and tension to maintain stability.</s>