3145
Early study Scintillation in radio waves due to the ionosphere was observed as early as 1951 by Antony Hewish , and he then reported irregularities in radiation received during an observation of a bright radio source in Taurus in 1954 .
 Antony Hewish
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Antony Hewish