23085
In addition to the line changes due to low surface gravity and fusion products , the most luminous stars have high mass-loss rates and resulting clouds of expelled circumstellar materials which can produce emission lines , P Cygni profiles , or forbidden lines .
 P Cygni
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 P Cygni