Give you a statement and table with its title in Markdown format, please determine whether the statement is supported or refuted by, or is unrelated to the table. It'a binary classification problem, you should choose the answer between supported and refuted. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| year | class | team | machine | points | wins |
| 1984 | 500cc | marlboro yamaha | yzr500 | 10 | 0 |
| 1985 | 500cc | marlboro yamaha | yzr500 | 2 | 0 |
| 1986 | 250cc | marlboro yamaha | yzr250 | 28 | 1 |
| 1987 | 500cc | marlboro yamaha | yzr500 | 56 | 0 |
| 1988 | 500cc | yamaha racing team | yzr500 | 36 | 0 |
| 1989 | 500cc | tech - 21 yamaha | yzr500 | 39 | 0 |
| 1990 | 500cc | tech - 21 yamaha | yzr500 | 10 | 0 |
| 1991 | 500cc | yrtr yamaha | yzr500 | 0 | 0 |
Title:
tadahiko taira
Statement:
team marlboro yamaha always has class 250cc
Answer:
refuted