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:
| City/Municipality | City/Municipality | No. of\nBarangays | Area\n(hectares) | Population\n(2010) | Income Class\n(2010) | Mayor\n(2010–2013) |
| --- | --- | --- | --- | --- | --- | --- |
|  | Baao | 30 | 10,663 | 54,971 | 3rd class | Melquiades I. Gaite |
|  | Balatan | 17 | 9,309 | 28,699 | 4th class | Ernesto A. Bagasbas |
|  | Bato | 33 | 10,712 | 48,306 | 3rd class | Jeanette R. Bernaldez |
|  | Bombon | 8 | 2,873 | 15,437 | 5th class | Ma. Luisa DC. Angeles |
|  | Buhi | 38 | 24,665 | 73,809 | 1st class | Rey P. Lacoste |
|  | Bula | 33 | 16,764 | 68,011 | 2nd class | Benjamin S. Decena |
|  | Cabusao | 9 | 4,680 | 18,049 | 5th class | Nebb P. Santiago |
|  | Calabanga | 48 | 16,380 | 78,119 | 1st class | Eduardo Severo |
|  | Camaligan | 13 | 468 | 22,254 | 5th class | Marilou Marquez-Hirose |
|  | Canaman | 24 | 4,327 | 32,390 | 4th class | Emmanuel S. Requejo |
|  | Caramoan | 49 | 27,600 | 44,945 | 2nd class | Constantino H. Cordial, Jr. |
|  | Del Gallego | 32 | 20,831 | 23,064 | 4th class | Lydia B. Abarientos |
|  | Gainza | 8 | 1,475 | 10,345 | 5th class | William Angeles Abilay |
|  | Garchitorena | 23 | 24,380 | 25,204 | 4th class | Solon O.Demetriou Jr. |
|  | Goa | 34 | 20,618 | 58,503 | 2nd class | Antero S. Lim |
|  | Iriga City | 36 | 13,735 | 105,919 | 4th class | Madeleine A. Gazmen |
|  | Lagonoy | 38 | 37,790 | 51,814 | 2nd class | Delfin R. Pilapil Jr. |
|  | Libmanan | 75 | 34,282 | 100,002 | 1st class | Marilyn A. Jimenez |
|  | Lupi | 38 | 19,912 | 30,118 | 3rd class | Raul M. Matamorosa |
|  | Magarao | 15 | 4,497 | 24,274 | 4th class | Salvador A. Senar Jr. |
|  | Milaor | 20 | 3,364 | 28,474 | 4th class | Rogelio A. Flores |
|  | Minalabac | 25 | 12,610 | 48,162 | 3rd class | Leovegildo D. Basmayor Jr. |
|  | Nabua | 42 | 9,620 | 80,111 | 1st class | Delia C. Simbulan |
| 25px | Naga City | 27 | 8,448 | 174,931 | 2nd class | John G. Bongat |
|  | Ocampo | 25 | 11,833 | 43,523 | 3rd class | Fidel C. Carido |
|  | Pamplona | 17 | 8,060 | 34,471 | 4th class | Gimeno A. Imperial |
|  | Pasacao | 19 | 14,954 | 45,946 | 3rd class | Asuncion V. Arsenio |
|  | Pili | 26 | 12,625 | 82,307 | 1st class | Tomas P. Bongalonta, Jr. |
|  | Presentacion | 18 | 14,380 | 20,023 | 4th class | Joey A. Deleña |
|  | Ragay | 38 | 40,022 | 54,934 | 1st class | Ricardo B. Aquino |
|  | Sagñay | 19 | 15,476 | 31,314 | 4th class | Evelyn B. Fuentebella |
|  | San Fernando | 22 | 7,176 | 33,281 | 4th class | Eugenio "jun" Lagasca, Jr. |
|  | San Jose | 29 | 4,307 | 38,523 | 4th class | Antonio B. Chavez |
|  | Sipocot | 46 | 24,343 | 64,042 | 1st class | Rogenor R. Astor |
|  | Siruma | 22 | 14,127 | 17,050 | 4th class | Sandy S. Ondis Sr. |
|  | Tigaon | 23 | 7,235 | 48,611 | 3rd class | Arnulf Bryan B. Fuentebella |
|  | Tinambac | 44 | 35,162 | 62,435 | 1st class | Ruel T. Velarde |
Question:
what is the number of mayors during 2010-2013 who were part of the 1st class?
Answer:
8