A biology can be extraterrestrial.Logical formLearned from9 sentences. An ocean can be extraterrestrial.Logical formLearned from9 sentences. Themes can be extraterrestrial.Logical formLearned from8 sentences. A colony can be extraterrestrial.Logical formLearned from8 sentences. A supervillain can be extraterrestrial.Logical formLearned from8 sentences. Probes can be extraterrestrial.Logical formLearned from8 sentences. Volcanoes can be extraterrestrial.Logical formLearned from8 sentences. A song can be about extraterrestrial beings.Logical formLearned from8 sentences. Evidence can be constituted-of-or-filled-with extraterrestrial life.Logical formLearned from8 sentences. A robot can be extraterrestrial.Logical formLearned from8 sentences. (Space travelers) can be extraterrestrial.Logical formLearned from8 sentences. Invasions can be extraterrestrial.Logical formLearned from8 sentences. Hints can be constituted-of-or-filled-with extraterrestrial life.Logical formLearned from8 sentences. An adventure can be extraterrestrial.Logical formLearned from8 sentences. A search can be for signs of extraterrestrial life.Logical formLearned from8 sentences.