Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Rnd | Date | Race Name | Length | Track | Location | Pole Position | Winning Driver |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1.0 | February 28 | Rafaela Indy 300 Heat 1 | mi (km) | Autódromo de Rafaela | Rafaela , Argentina | Lloyd Ruby | Al Unser |
| 2.0 | February 28 | Rafaela Indy 300 Heat 2 | mi (km) | Autódromo de Rafaela | Rafaela , Argentina | Al Unser | Al Unser |
| 3.0 | March 27 | Phoenix 150 | mi (km) | Phoenix International Raceway | Avondale , Arizona | Bobby Unser | Al Unser |
| 4.0 | April 25 | Trenton 200 | mi (km) | Trenton International Speedway | Trenton , New Jersey | Bobby Unser | Mike Mosley |
| 5.0 | May 29 | International 500 Mile Sweepstakes | mi (km) | Indianapolis Motor Speedway | Speedway , Indiana | Peter Revson | Al Unser |
| 6.0 | June 6 | Rex Mays Classic 150 | mi (km) | Wisconsin State Fair Park Speedway | West Allis , Wisconsin | Bobby Unser | Al Unser |
| 7.0 | July 3 | Pocono 500 | mi (km) | Pocono International Raceway | Long Pond , Pennsylvania | Mark Donohue | Mark Donohue |
| 8.0 | July 18 | Michigan 200 | mi (km) | Michigan International Speedway | Brooklyn , Michigan | Bobby Unser | Mark Donohue |
| 9.0 | August 15 | Tony Bettenhausen 200 | mi (km) | Wisconsin State Fair Park Speedway | West Allis , Wisconsin | Bobby Unser | Bobby Unser |
| 10.0 | September 5 | California 500 | mi (km) | Ontario Motor Speedway | Ontario , California | Mark Donohue | Joe Leonard |
| 11.0 | October 3 | Trenton 300 | mi (km) | Trenton International Speedway | Trenton , New Jersey | Bobby Unser | Bobby Unser |
Question:
Name the race name for june 6
Answer:
Rex Mays Classic 150