99549
The first half of the book explores Ernst Haeckel 's biogenetic law ( recapitulation ) - the largely discredited idea that embryonic developmental stages replay the evolutionary transitions of adult forms of an organism 's past descendants - and how this idea influenced thinking in biology , theology , and psychology .
 person: Ernst Haeckel
Given options, please tell me the categories of all the listed entity words.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} 
 Entities: Ernst Haeckel 
Answer:
 person: Ernst Haeckel