27970
The effect of using a viscoelastic suspending medium on the in - plane hydrodynamic interaction between two equally sized spheres in shear flow is studied experimentally to understand flow - induced assembly behavior ( i . e . , string formation ) .
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Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
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