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In 1929 , the construction of a dam at Ardnacrusha severely impacted salmon breeding and that , and the introduction of quotas , had by the 1950 s caused salmon fishing to cease .
 Ardnacrusha
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Ardnacrusha