49776
In the 1960 s he worked at Standard Telecommunication Laboratories , the research centre of Standard Telephones and Cables in Harlow , and it was here in 1966 that he laid the groundwork for fibre optics in communication .
 Standard Telecommunication Laboratories, Standard Telephones and Cables, Harlow
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Standard Telecommunication Laboratories, Standard Telephones and Cables, Harlow