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Matheson is a supplier of atmospheric gases , industrial gases , specialty gases , electronic materials , helium , propane , gas handling equipment , high performance purification systems , engineering and gas management services , and on-site gas generation , to various industries including semiconductor manufacturing , solar photovoltaic s , construction , welding , propane , laboratory analysis , hospitals , wine making , and lasers .
 Matheson, gas, gas, gas
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Matheson, gas, gas, gas