A source may pertain-to samples.Logical formLearned from20 sentences. (Serum samples) can be from patients.Logical formLearned from20 sentences. A history may pertain-to a sample.Logical formLearned from20 sentences. A sample can be crystalline.Logical formLearned from20 sentences. (Air samples) may contain radioactive materials.Logical formLearned from20 sentences. (Air samples) may be gathered.Logical formLearned from20 sentences. Samples can be from patients.Logical formLearned from20 sentences. A sample may pertain-to works.Logical formLearned from20 sentences. A sample may be frozen.Logical formLearned from20 sentences. A (dna sample) can be for an investigation.Logical formLearned from20 sentences. (Air samples) may be took.Logical formLearned from20 sentences. (Urine samples) can be in (drug tests).Logical formLearned from20 sentences. A laboratory may analyze samples.Logical formLearned from20 sentences. (Air samples) may undergo tests.Logical formLearned from20 sentences. Inspectors may take samples.Logical formLearned from20 sentences.