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:
| Locomotive | Serial No | Entered service | Owner | Operator | Livery | Gauge | Status |
| --- | --- | --- | --- | --- | --- | --- | --- |
| G511 | 84/1239 | October 1984 | Chicago Freight Car Leasing Australia | Southern Shorthaul Railroad | SSR yellow & black | Standard | Operational |
| G512 | 84/1240 | November 1984 | Chicago Freight Car Leasing Australia | Qube Logistics | CFCLA silver & blue | Standard | Operational |
| G513 | 84/1241 | November 1984 | Southern Shorthaul Railroad | Southern Shorthaul Railroad | SSR yellow & black | Standard | Operational |
| G514 | 84/1242 | November 1984 | Southern Shorthaul Railroad | Southern Shorthaul Railroad | SSR yellow & black | Standard | Operational |
| G515 | 84/1243 | November 1984 | Chicago Freight Car Leasing Australia | Qube Logistics | CFCLA silver & blue | Broad | Operational |
| G516 | 85/1229 | December 1985 | Aurizon | Aurizon | QR National maroon, yellow & black | Standard | Operational |
| G517 | 85/1230 | March 1986 | Freight Victoria | Freight Victoria | V/Line orange & grey | Standard | Scrapped |
| G518 | 85/1231 | February 1986 | Freight Victoria | Freight Victoria | V/Line orange & grey | Standard | Scrapped |
| G519 | 85/1232 | December 1986 | Pacific National | Pacific National | Freight Australia green & yellow | Standard | Operational |
| G520 | 85/1233 | March 1986 | Pacific National | Pacific National | Freight Australia green & yellow | Standard | Operational |
| G521 | 85/1234 | February 1986 | Australian Wheat Board | El Zorro | SCT Logistics red, white & black | Broad | Operational |
| G522 | 85/1235 | March 1986 | Pacific National | Pacific National | Pacific National blue & yellow | Broad | Operational |
| G523 | 86/1236 | March 1986 | Pacific National | Pacific National | Freight Australia green & yellow | Standard | Operational |
| G524 | 86/1237 | April 1986 | Pacific National | Pacific National | Freight Australia green & yellow | Broad | Operational |
| G525 | 86/1238 | April 1986 | Pacific National | Pacific National | Pacific National blue & yellow | Broad | Operational |
| G526 | 88/1256 | March 1988 | Pacific National | Pacific National | Freight Australia green & yellow | Standard | Operational |
| G527 | 88/1257 | April 1988 | Pacific National | Pacific National | Pacific National blue & yellow | Broad | Operational |
| G528 | 88/1258 | May 1988 | Pacific National | Pacific National | Freight Australia green & yellow | Standard | Operational |
| G529 | 88/1259 | June 1988 | Pacific National | Pacific National | Freight Australia green & yellow | Broad | Operational |
| G530 | 88/1260 | July 1988 | Pacific National | Pacific National | Pacific National blue & yellow | Standard | Operational |
| G531 | 88/1261 | July 1988 | Pacific National | Pacific National | Pacific National blue & yellow | Standard | Operational |
| G532 | 88/1262 | August 1988 | Australian Wheat Board | El Zorro | SCT Logistics red, white & black | Broad | Operational |
| G533 | 88/1263 | September 1988 | Australian Wheat Board | El Zorro | SCT Logistics red, white & black | Standard | Operational |
| G534 | 88/1264 | November 1988 | Aurizon | Aurizon | QR National maroon, yellow & black | Standard | Operational |
| G535 | 88/1265 | December 1988 | Australian Wheat Board | El Zorro | SCT Logistics red, white & black | Standard | Operational |
| G536 | 89/1266 | February 1989 | Pacific National | Pacific National | Pacific National blue & yellow | Standard | Operational |
| G537 | 89/1270 | May 1989 | Pacific National | Pacific National | Freight Australia green & yellow | Standard | Operational |
| G538 | 89/1271 | May 1989 | Pacific National | Pacific National | Freight Australia green & yellow | Standard | Operational |
| G539 | 89/1272 | June 1989 | Pacific National | Pacific National | Pacific National blue & yellow | Broad | Operational |
| G540 | 89/1273 | August 1989 | Pacific National | Pacific National | Freight Australia green & yellow | Standard | Operational |
| G541 | 89/1274 | September 1989 | Pacific National | Pacific National | Freight Australia green & yellow | Standard | Operational |
| G542 | 89/1275 | October 1989 | Pacific National | Pacific National | Freight Australia green & yellow | Broad | Operational |
| G543 | 89/1276 | November 1989 | Pacific National | Pacific National | Freight Australia green & yellow | Standard | Operational |
Question:
What is the Serial Number of the Locomotive that Entered Service October 1989?
Answer:
89/1275