Teacher:From the given sentence, extract the phrase (often noun or verb) that carries the given relationship. The generated phrase should be present in the sentence.
Teacher: Now, understand the problem? Solve this instance: Given Relationship: 'buy', Sentence: 'Two viagra online buy i .us the Paradoxical to ( also in Health in normal and offer of central or , the pills of that in bad effects side viagra 50 require the afterwards .'
Student:
buy