question: what can block the sun?
choices.text: iron oxide volcanoes spacecraft lamphreys a hosta satellites tetraceratops black widows
choices.label: A B C D E F G H
fact2: Or a veil of tiny particles from a volcanic eruption can block the sun.
combinedfact: volcanoes can block the sun
formatted_question: what can block the sun? (A) iron oxide (B) volcanoes (C) spacecraft (D) lamphreys (E) a hosta (F) satellites (G) tetraceratops (H) black widows