Task: Question Answering
Input (English): Problem: a jar of 220 marbles is divided equally among a group of marble - players today . if 2 people joined the group in the future , each person would receive 1 marble less . how many people are there in the group today ? 
Options: a ) 20 , b ) 21 , c ) 22 , d ) 23 , e ) 24
Output (English): a