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:
| position | best year | best 2 - year period | best 3 - year period | best 5 - year period | best 10 - year period | best 15 - year period |
| 1 | fischer | fischer | fischer | fischer , kasparov | fischer , capablanca | capablanca |
| 2 | kramnik | kramnik , capablanca , kasparov | capablanca , kasparov | fischer , kasparov | fischer , capablanca | karpov , kramnik |
| 3 | kasparov | kramnik , capablanca , kasparov | capablanca , kasparov | capablanca | kramnik | karpov , kramnik |
| 4 | botvinnik | kramnik , capablanca , kasparov | smyslov | kramnik , botvinnik | kasparov | smyslov , kasparov |
| 5 | capablanca | karpov , smyslov | botvinnik | kramnik , botvinnik | karpov , smyslov | smyslov , kasparov |
| 6 | karpov | karpov , smyslov | kramnik | smyslov | karpov , smyslov | fischer |
| 7 | smyslov , tal | botvinnik , alekhine | karpov | karpov , lasker | botvinnik , spassky | botvinnik , spassky , petrosian |
| 8 | smyslov , tal | botvinnik , alekhine | spassky , lasker | karpov , lasker | botvinnik , spassky | botvinnik , spassky , petrosian |
| 9 | petrosian | anand | spassky , lasker | alekhine , anand | anand | botvinnik , spassky , petrosian |
| 10 | euwe | tal , spassky | anand | alekhine , anand | lasker , petrosian | anand |
| 11 | spassky | tal , spassky | petrosian | petrosian , spassky | lasker , petrosian | tal |
| 12 | alekhine , anand | lasker , euwe | tal , alekhine | petrosian , spassky | tal , alekhine | alekhine , lasker |
| 13 | alekhine , anand | lasker , euwe | tal , alekhine | euwe , tal | tal , alekhine | alekhine , lasker |
| 14 | lasker | petrosian | euwe | euwe , tal | euwe | euwe |
| 15 | morphy | morphy | morphy | steinitz | steinitz | steinitz |
| 16 | steinitz | steinitz | steinitz | - | - | - |
Title:
none
Statement:
position 15 has a best 3 - year period of smyslov
Answer:
refuted