49678
Individuals such as Edward Yourdon , Larry Constantine , Gerald Weinberg , Tom DeMarco , and David Parnas began to publish articles and books with research results in an attempt to professionalize the software-development processes .
 Edward Yourdon, Larry Constantine, Gerald Weinberg, Tom DeMarco, David Parnas
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Edward Yourdon, Larry Constantine, Gerald Weinberg, Tom DeMarco, David Parnas