4679
In 1861 , he published his final work , The Young Gardener ’s Educator , described as being a series of lessons , in the conversational style , on subjects generally considered necessary for the young gardener to understand , viz. : English grammar , geology , botany , vegetable physiology , horticultural chemistry , physical geography , entomology , land measuring , architectural drawing , letter writing , penmanship , the measurement of artificer ’s work connected with gardening , etc. .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities:  
Answer:
 None