Relationships can be between principals.Logical formLearned from2 sentences. A principal may return to a school.Logical formLearned from2 sentences. A (continuation school) may be started by a principal.Logical formLearned from2 sentences. A principal may be installed.Logical formLearned from2 sentences. Some years can be as a principal of a school.Logical formLearned from2 sentences. Principal may retire in a month.Logical formLearned from2 sentences. A gratitude can be to a principal.Logical formLearned from2 sentences. A principal may commit an offence.Logical formLearned from2 sentences. A male may become principal of govts.Logical formLearned from2 sentences. (Vice principal) can be under a male.Logical formLearned from2 sentences. A male may meet requirements by a principal.Logical formLearned from2 sentences. A male can be a principal of a new school.Logical formLearned from2 sentences. A solution of clustering may be given by (principal components).Logical formLearned from2 sentences. A (female principal) can be in a region.Logical formLearned from2 sentences. A male may serve as (vice principal).Logical formLearned from2 sentences.