Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Boeing 737 Classic
Table title:
Specifications
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Variant </th><th class="highlighted"  colspan=1 rowspan=1 > 737-300 </th><th class="highlighted"  colspan=1 rowspan=1 > 737-400 </th><th class="highlighted"  colspan=1 rowspan=1 > 737-500 </th></tr>
<tr> <th colspan=1 rowspan=1 > Cockpit crew </th><td colspan=3 rowspan=1 > Two </td></tr>
<tr> <th colspan=1 rowspan=1 > 2-class </th><td colspan=1 rowspan=1 > 126 (8F@36" 118Y@32") </td><td colspan=1 rowspan=1 > 147 (10F@36" 137Y@32") </td><td colspan=1 rowspan=1 > 110 (8F@36" 102Y@32") </td></tr>
<tr> <th colspan=1 rowspan=1 > 1-class </th><td colspan=1 rowspan=1 > 140@32" - 149@30" </td><td colspan=1 rowspan=1 > 159@32" - 168@30" </td><td colspan=1 rowspan=1 > 122@32" - 132@30" </td></tr>
<tr> <th colspan=1 rowspan=1 > Exit limit </th><td class="highlighted"  colspan=1 rowspan=1 > 149 </td><td class="highlighted"  colspan=1 rowspan=1 > 188 </td><td class="highlighted"  colspan=1 rowspan=1 > 145 </td></tr>
<tr> <th colspan=1 rowspan=1 > Seat width </th><td colspan=3 rowspan=1 > 6-abreast : 17in / 43.2 cm, 5-abreast : 19in / 48.3 cm, 4-abreast : 21in / 53.3 cm </td></tr>
<tr> <th colspan=1 rowspan=1 > Overall length </th><td colspan=1 rowspan=1 > 109 ft 7 in / 33.4 m </td><td colspan=1 rowspan=1 > 119 ft 7 in / 36.4 m </td><td colspan=1 rowspan=1 > 101 ft 9 in / 31 m </td></tr>
<tr> <th colspan=1 rowspan=1 > Wing </th><td colspan=3 rowspan=1 > span 94 ft 9 in / 28.9 m, area 980 sq ft (91.04 m2), sweep 25°, AR 9.17 </td></tr>
<tr> <th colspan=1 rowspan=1 > Height </th><td colspan=3 rowspan=1 > 36 ft 6 in / 11.1 m, Cabin: 84.2in / 213.9 cm </td></tr>
<tr> <th colspan=1 rowspan=1 > Fuselage width </th><td colspan=3 rowspan=1 > 3.76 m (12 ft 4 in) </td></tr>
<tr> <th colspan=1 rowspan=1 > Maximum Takeoff Weight </th><td colspan=1 rowspan=1 > 138,500 lb / 62,822 kg </td><td colspan=1 rowspan=1 > 150,000 lb / 68,038 kg </td><td colspan=1 rowspan=1 > 133,500 lb / 60,554 kg </td></tr>
<tr> <th colspan=1 rowspan=1 > Maximum landing weight </th><td colspan=1 rowspan=1 > 116,600 lb / 52,888 kg </td><td colspan=1 rowspan=1 > 124,000 lb / 56,245 kg </td><td colspan=1 rowspan=1 > 110,000 lb / 49,895 kg </td></tr>
<tr> <th colspan=1 rowspan=1 > Maximum zero-fuel weight </th><td colspan=1 rowspan=1 > 109,600 lb / 49,713 kg </td><td colspan=1 rowspan=1 > 117,000 lb / 53,070 kg </td><td colspan=1 rowspan=1 > 103,000 lb / 46,720 kg </td></tr>
<tr> <th colspan=1 rowspan=1 > Operating empty weight </th><td colspan=1 rowspan=1 > 72,360 lb / 32,821 kg </td><td colspan=1 rowspan=1 > 76,760 lb / 34,817 kg </td><td colspan=1 rowspan=1 > 70,440 lb / 31,951 kg </td></tr>
<tr> <th colspan=1 rowspan=1 > Fuel capacity </th><td colspan=1 rowspan=1 > 5,311USgal / 20,100L </td><td colspan=1 rowspan=1 > 5,311USgal / 20,100L </td><td colspan=1 rowspan=1 > 5,311USgal / 20,100L </td></tr>
<tr> <th colspan=1 rowspan=1 > Cargo capacity </th><td colspan=1 rowspan=1 > 1,068 ft³ / 30.2m³ </td><td colspan=1 rowspan=1 > 1,373 ft³ / 38.9m³ </td><td colspan=1 rowspan=1 > 882 ft³ / 23.3m³ </td></tr>
<tr> <th colspan=1 rowspan=1 > Takeoff </th><td colspan=1 rowspan=1 > 6,365ft / 1,940m </td><td colspan=1 rowspan=1 > 8,333ft / 2,540m </td><td colspan=1 rowspan=1 > 6,004ft / 1,830m </td></tr>
<tr> <th colspan=1 rowspan=1 > Service ceiling </th><td colspan=3 rowspan=1 > 37,000 ft (11,278 m) </td></tr>
<tr> <th colspan=1 rowspan=1 > Speed </th><td colspan=3 rowspan=1 > MMO: Mach 0.82 (473 kn; 876 km/h), cruise: Mach 0.745 (430 kn; 796 km/h) </td></tr>
<tr> <th colspan=1 rowspan=1 > Range </th><td colspan=1 rowspan=1 > 2,255 nmi (4,176 km) </td><td colspan=1 rowspan=1 > 2,060 nmi (3,820 km) </td><td colspan=1 rowspan=1 > 2,375 nmi (4,398 km) </td></tr>
<tr> <th colspan=1 rowspan=1 > Engine x2 </th><td colspan=1 rowspan=1 > CFM56-3B-2 </td><td colspan=1 rowspan=1 > CFM56-3C-1 </td><td colspan=1 rowspan=1 > CFM56-3B-1 </td></tr>
<tr> <th colspan=1 rowspan=1 > Takeoff thrust x2 </th><td colspan=1 rowspan=1 > 22,000 lbf (98 kN) </td><td colspan=1 rowspan=1 > 23,500 lbf (105 kN) </td><td colspan=1 rowspan=1 > 20,000 lbf (89 kN) </td></tr>
<tr> <th colspan=1 rowspan=1 > ICAO Type </th><td colspan=1 rowspan=1 > B733 </td><td colspan=1 rowspan=1 > B734 </td><td colspan=1 rowspan=1 > B735 </td></tr>
</table>
Question:
How many variants are there of the Boeing 737 Classic, and what is the seating capacity of each variant?
Answer:
The 737 Classic, includes three variants and can seat between 145 and 188 passengers.