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: Lee Oskar Major Diatonic Harmonica A (A)
Product description: Lee Oskar makes this major diatonic harmonica for those who play blues, rock, country, folk, and jazz. Airtight, easy to bend, expressive sound. Well-suited for blues, rock, country, folk, and jazz. They're more airtight, easier to bend, and better sounding than many harps. Modular design. Built in Japan to his exacting standards and incorporating new techniques and materials, it was in 1983 that Lee Oskar introduced his new harmonica. The radically different harp design grew out of Lee's frustration with the lack of quality and consistency in the mouth harps of the day. The design also benefited from Oskar's insights as a seasoned recording and touring pro. The Dane's Design Central to Oskar's design is a smooth plastic comb that doesn't swell like traditional wood combs. Aside from being easier to keep clean, the plastic comb is impervious to the swelling of conventional harmonica wood combs that can tear up the player's lips. By making affordable replacement reed plates available, Oskar's harps can be easily refurbished. You no longer need to toss out a harmonica because a reed or two has gone south. Replacement reed plates are available for every model in the Lee Oskar harmonica lineup and installation is easy since they mount to the comb with just three self-tapping screws. The reed plates have wide chambers and narrow dividers for faster, easier playing. A precision-molded, recessed bed holds the reed plate securely to prevent air leakage and project a bigger sound. The corrosion-proof, stainless steel cover plates are also engineered for excellent projection and tone. (Replacement cover plates are also available.) Lee Oskar harmonicas are tuned to 441-plus hertz for a brighter sound. With equal tuning by octaves, Lee Oskar harps have excellent intonation for blowing highly articulate, single-note leads. More Keys and Modes Lee's innovation didn't stop with a better-designed harp. Recognizing the need for harmonicas tuned in other than the major and natural...
Product feature: Airtight, Easier second-position bending, All key components are replaceable, Durable and longer-lasting than other harps, Modular design
Product brand: Lee Oskar
Target attributes: Quantity
Answer: attribute: quantity
value: None
source: None