A halo can be bluish.Logical formLearned from4 sentences. A halo may disappear.Logical formLearned from4 sentences. Haloes can be concentric.Logical formLearned from4 sentences. (Halo filters) can be lenticular.Logical formLearned from4 sentences. A halo can be subtle.Logical formLearned from4 sentences. An inner part may pertain-to a halo.Logical formLearned from4 sentences. A source may be surrounded by a (x-ray halo).Logical formLearned from4 sentences. A (x-ray halo) can be diffuse.Logical formLearned from4 sentences. An origin may pertain-to a halo.Logical formLearned from4 sentences. A (halo effect) may pertain-to an ipod.Logical formLearned from4 sentences. Gas can be in a halo.Logical formLearned from4 sentences. Haloes can be constituted-of-or-filled-with galaxies.Logical formLearned from4 sentences. Haloes can be around galaxies.Logical formLearned from4 sentences. A halo can be simple.Logical formLearned from4 sentences. A halo can be negative.Logical formLearned from4 sentences.