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Carl Sagan , Eric Chaisson , Hubert Reeves , Erich Jantsch , and Preston Cloud , among others , extensively championed cosmic evolution at roughly the same time around 1980 .
 person: Carl Sagan; person: Eric Chaisson; person: Hubert Reeves; person: Erich Jantsch; person: Preston Cloud
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 person: Carl Sagan; person: Eric Chaisson; person: Hubert Reeves; person: Erich Jantsch; person: Preston Cloud