23190
Ca , K , Mg and Na were the most abundant elements , with mean contents of 219 . 38 , 446 . 93 , 49 . 06 and 95 . 91mgkg ( - 1 ) respectively .
 Chemical: Ca; Chemical: K; Chemical: Mg; Chemical: Na
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Ca; Chemical: K; Chemical: Mg; Chemical: Na