(Oxygen atoms) may undergo a replacement.Logical formLearned from3 sentences. Replacements can be open-source.Logical formLearned from3 sentences. A replacement may be built on a site.Logical formLearned from3 sentences. A station may be built as a replacement.Logical formLearned from3 sentences. A replacement may be treated.Logical formLearned from3 sentences. Variety can be constituted-of-or-filled-with replacement.Logical formLearned from3 sentences. A (valve replacement) can be percutaneous.Logical formLearned from3 sentences. A circle may undergo a replacement.Logical formLearned from3 sentences. A replacement can be for helicopters.Logical formLearned from3 sentences. A content may undergo a replacement.Logical formLearned from3 sentences. A male may have a (hip replacement operation).Logical formLearned from3 sentences. A replacement can be for stations.Logical formLearned from3 sentences. A replacement can be at a time.Logical formLearned from3 sentences. Construction may begin on a (replacement structure).Logical formLearned from3 sentences. A (replacement squadron) may pertain-to a military-or-other-action-organization.Logical formLearned from3 sentences.