how many total locomotives have a disposition of "to southern pacific"?
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col : number/name | wheel arrangement | builder | year | disposition and\nlocation row 1 : 1\nsan francisco | 4-4-0 | norris locomotive works | 1862 | to southern pacific #2, #1109. unknown. row 2 : 2\nsan jose | 4-4-0 | norris locomotive works | 1862 | to sf&np as little josie. to northwestern pacific railroad #1 row 3 : 3\nt. dame | 4-4-0 | norris locomotive works |  | to southern pacific #3, #1110. unknown. row 4 : 4\na.h. houston | 4-4-0 | cooke locomotive and machine works | 11/1863 | to southern pacific #4. unknown. row 5 : 5\nchas. mclaughlin | 4-4-0 | cooke locomotive and machine works |  | to southern pacific #5. unknown. row 6 : 6\ncalifornia | 4-4-0 | h. j. booth at union iron works | 7/1865 | to southern pacific #6, #1303. rebuilt 1873. scrapped row 7 : 7\natlantic | 4-4-0 | h.j. booth at union iron works | 1865 | to southern pacific #7, #1231, scrapped in 1895. row 8 : 8\nunion | 0-4-0 | h.j. booth at union iron works | 6/1867 | to southern pacific #8, #1002. unknown. row 9 : 9\ndonahue | 4-4-0 | cooke locomotive and machine works | 4/1870 | to southern pacific #9. unknown. row 10 : 10\nnewhall |  |  |  | to southern pacific #10. unknown. row 11 : 11\nmenlo park | 4-4-0 | mason machine works | 4/16/1870 | to southern pacific #11. unknown. row 12 : 12\nracer |  | mck/a | 7/1868 | to southern pacific #12. unknown. row 13 : 13\nshoshone |  | norris locomotive works | 6/1867 | to southern pacific #13. unknown. row 14 : 14\nred eagle |  | cooke locomotive and machine works | 7/1868 | to southern pacific #14. unknown. row 15 : 15\nblack deer |  | mck/a | 10/1867 | to southern pacific #15. unknown. row 16 : 16\nreindeer |  | schenectady locomotive works | 11/1868 | to southern pacific #1151. unknown. row 17 : 17\nmohave |  | norris locomotive works | 7/1860 | to southern pacific #17. unknown. row 18 : 18\npeeler |  | rhode island locomotive works | 11/1868 | to southern pacific #18. unknown. row 19 : 19\nraven |  | schenectady locomotive works | 10/1868 | to southern pacific #19. unknown. row 20 : 20 |  | baldwin locomotive works | 6/1872 | to southern pacific #20. unknown.
how many total locomotives have a disposition of "to southern pacific"?
Number/name Wheel arrangement Builder Year Disposition and\nLocation
1\nSan Francisco 4-4-0 Norris Locomotive Works 1862 To Southern Pacific #2, #1109. Unknown.
2\nSan Jose 4-4-0 Norris Locomotive Works 1862 To SF&NP as Little Josie. To Northwestern Pacific Railroad #1. Retired in 1921.
3\nT. Dame 4-4-0 Norris Locomotive Works To Southern Pacific #3, #1110. Unknown.
4\nA.H. Houston 4-4-0 Cooke Locomotive and Machine Works 11/1863 To Southern Pacific #4. Unknown.
5\nChas. McLaughlin 4-4-0 Cooke Locomotive and Machine Works To Southern Pacific #5. Unknown.
6\nCalifornia 4-4-0 H. J. Booth at Union Iron Works 7/1865 To Southern Pacific #6, #1303. Rebuilt 1873. Scrapped in 1911.
7\nAtlantic 4-4-0 H.J. Booth at Union Iron Works 1865 To Southern Pacific #7, #1231, scrapped in 1895.
8\nUnion 0-4-0 H.J. Booth at Union Iron Works 6/1867 To Southern Pacific #8, #1002. Unknown.
9\nDonahue 4-4-0 Cooke Locomotive and Machine Works 4/1870 To Southern Pacific #9. Unknown.
10\nNewhall To Southern Pacific #10. Unknown.
11\nMenlo Park 4-4-0 Mason Machine Works 4/16/1870 To Southern Pacific #11. Unknown.
12\nRacer McK/A 7/1868 To Southern Pacific #12. Unknown.
13\nShoshone Norris Locomotive Works 6/1867 To Southern Pacific #13. Unknown.
14\nRed Eagle Cooke Locomotive and Machine Works 7/1868 To Southern Pacific #14. Unknown.
15\nBlack Deer McK/A 10/1867 To Southern Pacific #15. Unknown.
16\nReindeer Schenectady Locomotive Works 11/1868 To Southern Pacific #1151. Unknown.
17\nMohave Norris Locomotive Works 7/1860 To Southern Pacific #17. Unknown.
18\nPeeler Rhode Island Locomotive Works 11/1868 To Southern Pacific #18. Unknown.
19\nRaven Schenectady Locomotive Works 10/1868 To Southern Pacific #19. Unknown.
20 Baldwin Locomotive Works 6/1872 To Southern Pacific #20. Unknown.
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