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:
| Name or route | type | elevation groundstation | elevation mountainstation | slope length | capacity in persons/hour | construction year(s) |
| --- | --- | --- | --- | --- | --- | --- |
| Betten Betten Village | aerial tramway | 832.0 | 1199.0 | 872.0 | 350.0 | 1950 1965 |
| Betten Village Bettmeralp | aerial tramway | 1199.0 | 1931.0 | 1610.0 | 500.0 | 1951 1967 1979 |
| Betten Bettmeralp | aerial tramway | 832.0 | 1933.0 | 2446.0 | 970.0 | 1974 |
| Bettmeralp Bettmerhorn | gondola | 1991.0 | 2652.0 | 2324.0 | 2400.0 | 1975 1995 |
| Wurzenbord | chairlift | 1966.0 | 2224.0 | 1075.0 | 2000.0 | 2003 |
| Schönbiel | chairlift | 1956.0 | 2296.0 | 1669.0 | 2800.0 | 1998 |
| Alpmatten 1 | surface lift | 1861.0 | 1951.0 | 294.0 | 650.0 | 1971 |
| Alpmatten 2 | surface lift | 1861.0 | 1951.0 | 294.0 | 650.0 | 1971 |
| Bettmeralp 1 | surface lift | 1940.0 | 2067.0 | 640.0 | 1000.0 | 1972 1955 |
| Bettmeralp 2 | surface lift | 1940.0 | 2067.0 | 640.0 | 1000.0 | 1971 |
| Tanzbode | surface lift | 1985.0 | 2016.0 | 488.0 | 720.0 | 1995 1992:Temporary lift |
| Trainerlift | surface lift | 1974.0 | 2026.0 | 303.0 | 820.0 | 1983 1st trainer:1969 |
| Lager 1 | surface lift | 1974.0 | 2035.0 | 336.0 | 1000.0 | 1983 |
| Lager 2 | surface lift | 1974.0 | 2022.0 | 223.0 | 720.0 | 1999 |
Question:
Which slope length has a type of surface lift, and an elevation groundstation smaller than 1974, and a construction year(s) of 1971, and a Name or route of alpmatten 1?
Answer:
294.0