(Tumor progression) may constitute a problem of importance.Logical formLearned from2 sentences. A progression may indicate that something-is-the-case.Logical formLearned from2 sentences. A progression may be provided from an area.Logical formLearned from2 sentences. A progression may pertain-to a drug.Logical formLearned from2 sentences. A person may follow a progression of injury on a root.Logical formLearned from2 sentences. An one may undergo a progression.Logical formLearned from2 sentences. A (character progression) may pertain-to a person.Logical formLearned from2 sentences. A message may undergo a progression.Logical formLearned from2 sentences. (Career progression) can be difficult.Logical formLearned from2 sentences. Control may pertain-to a (career progression).Logical formLearned from2 sentences. Progression can be for a learner.Logical formLearned from2 sentences. A progression can be in (team play).Logical formLearned from2 sentences. A progression can be over a number of years.Logical formLearned from2 sentences. Performance may prohibit progression.Logical formLearned from2 sentences. A development of concepts may follow a progression.Logical formLearned from2 sentences.