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:
| Driver | Constructor | Laps | Time/Retired | Grid |
| --- | --- | --- | --- | --- |
| Michael Schumacher | Ferrari | 44.0 | 1:21:20.634 | 1.0 |
| Rubens Barrichello | Ferrari | 44.0 | +1.977 | 3.0 |
| Juan Pablo Montoya | Williams - BMW | 44.0 | +18.445 | 5.0 |
| David Coulthard | McLaren - Mercedes | 44.0 | +19.357 | 6.0 |
| Ralf Schumacher | Williams - BMW | 44.0 | +56.440 | 4.0 |
| Eddie Irvine | Jaguar - Cosworth | 44.0 | +1:17.370 | 8.0 |
| Mika Salo | Toyota | 44.0 | +1:17.809 | 9.0 |
| Jacques Villeneuve | BAR - Honda | 44.0 | +1:19.855 | 12.0 |
| Allan McNish | Toyota | 43.0 | +1 Lap | 13.0 |
| Nick Heidfeld | Sauber - Petronas | 43.0 | +1 Lap | 18.0 |
| Takuma Sato | Jordan - Honda | 43.0 | +1 Lap | 16.0 |
| Olivier Panis | BAR - Honda | 39.0 | Engine | 15.0 |
| Giancarlo Fisichella | Jordan - Honda | 38.0 | Engine | 14.0 |
| Pedro de la Rosa | Jaguar - Cosworth | 37.0 | Suspension | 11.0 |
| Felipe Massa | Sauber - Petronas | 37.0 | Engine | 17.0 |
| Kimi Räikkönen | McLaren - Mercedes | 35.0 | Engine | 2.0 |
| Jarno Trulli | Renault | 35.0 | Engine | 7.0 |
| Anthony Davidson | Minardi - Asiatech | 17.0 | Spin | 20.0 |
| Jenson Button | Renault | 10.0 | Engine | 10.0 |
| Mark Webber | Minardi - Asiatech | 4.0 | Gearbox | 19.0 |
Question:
What was the retired time on someone who had 43 laps on a grip of 18?
Answer:
+1 Lap