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:
| Location | Town | Output (MW AC) | Modules | Number of arrays |
| --- | --- | --- | --- | --- |
| H. Lee Dennison Building | Hauppauge | 1.75 | 7,737 | 24 |
| North County Complex | Hauppauge | 0.5 | 3,431 | 9 |
| Cohalan Court Complex | Central Islip | 3.5 | 15,113 | 27 |
| Riverhead County Center | Riverside | 3 | 11,536 | 31 |
| Brentwood LIRR Parking Lot | Brentwood | 1 | 3,924 | 11 |
| Deer Park LIRR Parking Lot | Deer Park | 2.25 | 3,924 | 39 |
| Ronkonkoma LIRR Parking Lot (south) | Ronkonkoma | 5 | 20,110 | 44 |
Question:
what was the number of arrays of the riverhead county center project location?
Answer:
31