human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Rank, Rider, Mon 30 May, Tues 31 May, Wed 1 June, Thurs 2 June, Fri 3 June
###Question: What is the number of riders that had a Tues 31 May time of 18' 55.91 124.236mph?
gpt
SELECT COUNT Rider FROM table WHERE Tues 31 May = 18' 55.91 124.236mph