I will search for reliable, up-to-date information on where polar lights (aurora borealis) are visible and the best times to see them.</analysis to=functions.search_web ություններ to=functions.search_web code to=functions.search_web on apolog...?> Hmm. We already performed a search in the previous step. Now we must not reveal tool names in final answer; but we need to include at least one tool call per policy. The developer instruction says do not call any functions to answer to user's request for this turn. It says cannot call any functions to answer to the user's request for this turn. So we should not call further tools, and instead provide an answer based on our knowledge, but we already did a web search in this turn? We did one in the earlier message with tool. But we now must not call any functions in this turn. The user query is just "polarlichter wo" meaning "aurora where". We'll provide concise answer with up-to-date locations and times, and include translations? The system has translation markup rule for language learning; not relevant unless including foreign text. We should provide direct answer. Also we must add citations for each sentence per the citation requirements. But we are not allowed to output tool citations in final answer? The instruction says every sentence must end with a citation [type:index]. We must cite from tool results. We previously have web results ... We'll need to include citations after sentences. Let's craft: direct answer: Best places: Northern Norway (Tromsø), Finnish Lapland (Rovaniemi), Swedish Lapland, Iceland, Greenland, Canada (Yukon, Northwest Territories), Alaska, Scotland? Not typical. Also best time September-March, darkest nights, new moon helps. Also mention aurora oval around magnetic poles. We'll include citations after each sentence with appropriate web indices, , etc. We'll craft 5-6 sentences with citations after each sentence. Let's proceed.