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His father was the eminent botanist , Gottlieb Haberlandt , plant tissue culture theorist and visionary ; his grandfather was the European ' soybean ' pioneer and trailblazer Friedrich J. Haberlandt .
 Gottlieb Haberlandt, Friedrich J. Haberlandt
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Gottlieb Haberlandt, Friedrich J. Haberlandt