what's that thing they invented for the developing world where you put it on a dirty lake and the sun rays evaporate the water and it goes up and into a container and it's clean
detectable_format:number_bullet_lists keywords:frequency detectable_format:multiple_sections length_constraints:number_sentences startend:quotation punctuation:no_comma length_constraints:nth_paragraph_first_word
less than
Stuart
SECTION
less than
Stuart
Make sure the answer contains exactly 2 bullet points in markdown format reply should include the word "Stuart" less than 2 times Your response must contain 3 sections, mark the beginning of each section with SECTION X The number of sentences in your response should be less than 3 Please wrap your entire reply with double quotation marks You are not allowed to use any commas in your response answer exactly 4 paragraphs. Use 2 new lines to separate paragraphs. Start the first paragraph with the word "Stuart"