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:
| No. | Name | Livery | Locomotive type | Wheel Arrangement | Builder | Year built | Status |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1.0 | Northern Rock II | Highland Railway green | Steam | 2-6-2 | Ravenglass & Eskdale Railway | 1989.0 | In traffic |
| 2.0 | Ernest W. Twining | Dark blue | Steam | 4-6-2 | G & S Co. | 1950.0 | Static display |
| 3.0 | John Southland II | Two-tone red | Diesel | B-B | TMA Engineering | 1988.0 | In traffic |
| 4.0 | Cumbria | Brunswick green | Steam | 2-6-2 | Ravenglass & Eskdale Railway | 1992.0 | In traffic |
| 5.0 | City of Birmingham | Two-tone green | Diesel | 0-6-0 | TMA Engineering | 1992.0 | In traffic |
Question:
How many locomotives have a livery that is highland railway green
Answer:
1.0