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
punctuation:no_comma startend:quotation keywords:frequency length_constraints:number_sentences detectable_format:multiple_sections length_constraints:nth_paragraph_first_word detectable_format:number_bullet_lists
less than
Stuart
less than
SECTION
Stuart
You are not allowed to use any commas in your response Please wrap your entire reply with double quotation marks reply should include the word "Stuart" less than 2 times The number of sentences in your response should be less than 3 Your response must contain 3 sections, mark the beginning of each section with SECTION X answer exactly 4 paragraphs. Use 2 new lines to separate paragraphs. Start the first paragraph with the word "Stuart" Make sure the answer contains exactly 2 bullet points in markdown format