Instruction: First, identify the target attributes from the provided list. Then, scan the product title, description, feature, and brand to extract the values associated with each target attribute. Finally, create a list of dictionaries, each containing the extracted attribute, its corresponding value, and the source where it was found.

Input:
Product title: Sevylor Pointer K2 Kayak
Product description: Utilizing the same construction and features as Pointer K1 , this is the Tandem of the Touring kayak line, with excellent tracking characteristics. Standard equipment includes: luggage type storage/carry bag, 2 seats with comfortable inflatable backrests, rear cargo hatch with cover, bungee lacing for deck cargo, bungee paddle holders, bow and stern lifting handle, water bottle holder, mesh pocket inside the cockpit, 2 Boston valves and 1 Jumbo valve, owner's manual and repair kit. Spray skirts and the skirt attachment are optional (U113CMB), The Pointer K2 inflatable kayak offers the same construction and features as the K1, but adds tandem seating, making it a great choice for couples or families. The Pointer K2, as the name implies, has a pointed bow and stern. Combined with a directional strake and a flat bottom construction, the pointed shell tracks extremely well--better than any other inflatable kayak. As with all Sevylor inflatables, however, it also performs well in a fast-flowing river, with an ABS structural frame helping shed water. The boat comes standard with a pair of padded backrests to keep paddlers comfortable on long days. And kayakers will have plenty of room to store their gear thanks to the included luggage-type storage bag. Other features include a rear cargo hatch with a cover, bungee lacing for the deck cargo, bungee paddle holders, a bow and stern lifting handle, a water bottle holder, a mesh pocket inside the cockpit, two Boston valves and 1 Jumbo valve, and a repair kit. Spray skirts and a skirt attachment system are sold separately., The Pointer K2 comes with a luggage-type storage bag. Specifications: LOA (length overall): 14 feet 4 inches Beam: 33 inches Weight: 41 pounds Capacity: 2 people Weight capacity: 600 pounds Colors: Yellow About Sevylor The road from Sevylor's founding in 1948 to its current role as the dominant supplier of a wide range of inflatables--such as kayaks, boats, and towables--is a long one, with plenty of original inventions and innovations along the way. Established in a city suburb of Vitry, France, by electronics engineer Berco Grimbert, Sevylor originally built electrical accessories, with a sideline business dedicated to using its high-frequency welding machines to manufacture PVC consumer goods. The first inflatable to receive rave notice was a small bathtub called the Dou Dou. Perfect for postwar France, the inflatable tub was portable, convenient, practical, easy to clean, durable, and, best of all, affordable. After moving to the picturesque Alsatian village of Buhl, the company expanded into developing valves, pumps, boats, inflatable pools, and a variety of water toys. In the ensuing years, Sevylor first developed a PVC that had "memory"--meaning it could return to its original shape regardless of temperature--and then made history by releasing an inflatable pool mattress with a headrest and circular pockets. In 1986, the company invented the Ski Bob, a real turning point in the evolution of the towables business. Today, Sevylor's innovative designs include tenders, hunting and fishing boats, specialty boats and kayaks, towables, snow tubes, air beds, pool floats, river tubes, swim and sport rings, and more.
Product feature: Inflatable tandem kayak with pointed bow and stern for better tracking, Directional strake and flat-bottom construction; includes 2 padded backrests, ABS structural frame helps shed water; includes luggage-type storage bag, Rear cargo hatch with cover; bungee lacing and bungee paddle holders, 2 Boston valves and 1 Jumbo valve; measures 14 feet 4 inches long
Product brand: Sevylor
Target attributes: Number of Riders
Answer: attribute: number of riders
value: k2
source: product title
attribute: number of riders
value: 2
source: product description
attribute: number of riders
value: tandem
source: product feature
attribute: number of riders
value: k2
source: product description
attribute: number of riders
value: tandem
source: product description
attribute: number of riders
value: 2
source: product feature