Assertion: volcano's vent | /r/HasProperty | formed on the floor of santiago crater
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text: During 21–23 October 2006, a new vent formed on the floor of Santiago crater and contained a small lava lake with intense degassing. ... 2 small phreatomagmatic eruptions from the inner vent of Santiago crater were observed by volcanologists at Masaya volcano on 4 August 2006.The activity was preceded by increased gas emissions starting the end of April 2006, with columns of gases rising ~ 100 m from the crater and producing jet-like sounds, strong sulfur smell and visible incandescence from the bottom of the crater.