user: You are a structured reasoning expert tasked with solving problems step by step. 
You first think about the reasoning process in the mind and then provide the answer. The reasoning process and answer should be enclosed within <think> </think> and <answer> </answer> tags, respectively, i.e., <think> reasoning process here </think> <answer> answer here </answer>. 
Given a question and the associated knowledge graph triplets (entity, relation, entity), you are asked to answer the question with these triplets and your own knowledge. 
You can break down the original question into several sub-questions and explore the given knowledge graph to solve them step-by-step. If there are multiple possible answers, choose one as the final answer. 
After thinking, when you finally reach a conclusion, clearly state the answer within <answer> </answer> tags, i.e., <answer> answer here </answer>. 
Question: Which brand of guitar does the music producer which produced Vai Piano Reductions, Volume 1, play? 
Knowledge Triplets: Brand, organization.organization_sector.organizations_in_this_sector, ProPositions Brand Management
Brand, common.topic.webpage, m.0b45_vq
Non-Agent, type.type.domain, Type Ontology
Subjects, type.property.reverse_property, Subject of
Musical Release, type.type.domain, Music
Brand, common.topic.subject_of, ProPositions Brand Management
Brand, type.property.schema, Brand slogan
Business, common.topic.article, m.01xwjpj
brand, type.property.schema, Condiment
Business, freebase.domain_profile.featured_views, Venture Investor
Currency, freebase.type_profile.published, Published
Board Member Title, freebase.type_profile.published, Published
Brand, common.topic.subjects, Decathlon UK
Business, type.domain.types, Currency
Notable for, rdf-schema#domain, Topic
mkbwerkplaats.nl, common.topic.subjects, Brand
Venture Funded Company, type.type.domain, Business
Topic, type.type.properties, Description
Product lines, rdf-schema#domain, Brand
Musical Release, type.type.properties, Credited as
Brand, rdf-schema#domain, Brand slogan
Musical Release, type.type.expected_by, Release
Business, type.domain.types, Product ingredient
Notable types, type.property.schema, Topic
Business, type.domain.types, Product Endorsee
m.09x4_r6, common.webpage.topic, Brand
Brand, base.brand.glossary.definition, Branding agency
Consumer product, type.type.expected_by, Products
Business, type.domain.types, Issuer
Brand, type.property.master_property, Owner(s)
Subjects, rdf-schema#domain, Topic
Business, type.domain.types, Company-product relationship
Business, freebase.domain_profile.featured_views, m.05c_024
Brand, base.brand.glossary.definition, Brand name
Business, freebase.domain_profile.featured_views, Product Theme
Product category, type.type.domain, Business
Topic, type.type.properties, Article
Owner(s), type.property.reverse_property, Brand
Brand, type.type.expected_by, Brands with this flavor
m.09xpfsh, common.webpage.topic, Brand
Business, freebase.domain_profile.featured_views, Billionaires by Net Worth
Job title, freebase.type_hints.included_types, Topic
Business, type.domain.types, Product with ingredients
Parent brand, rdf-schema#domain, Brand
Parent brand, rdf-schema#range, Brand
Brand, common.topic.subject_of, aReputation
Brand, common.topic.webpage, m.09ybgp3
Region, rdf-schema#domain, Musical Release
Business, freebase.domain_profile.featured_views, Endorsed Product
Board Member Title, freebase.type_hints.included_types, Topic
Business, freebase.domain_profile.featured_views, Advertising slogan
Topic, type.type.properties, Weblink
Brands carried, type.property.schema, Retailer
Topic, type.type.properties, Also known as
Brand, type.property.schema, Guitar pickup
Job title, freebase.type_profile.kind, Definition
Brand, freebase.type_profile.equivalent_topic, Brand
Brand, common.topic.subjects, MCM House
Brand, rdf-schema#domain, Product line
Musical Release, type.type.expected_by, Musical Release
Job title, freebase.type_profile.published, Published
Topic, common.topic.article, m.0kpqw_
Brand, organization.organization_sector.organizations_in_this_sector, A Hundred Monkeys
Venture Funded Company, freebase.type_profile.strict_included_types, Topic
MCM House, common.topic.subject_of, Brand
Business Operation, freebase.type_profile.strict_included_types, Topic
Image, rdf-schema#domain, Topic
Business, type.domain.types, Company-product-line relationship
Brand, freebase.type_profile.strict_included_types, Non-Agent
Also known as, type.property.schema, Topic
Shopping center, type.type.domain, Business
Business, freebase.domain_profile.category, Products & Services
Business, freebase.domain_profile.featured_views, Issue Type
Business, type.domain.types, Shopping center owner
Colors, rdf-schema#range, Brand colors
Weblink, type.property.schema, Topic
Topic, type.type.properties, Social media presence
Slogans, owl#inverseOf, Brand
Business Operation, type.type.domain, Business
Topic equivalent webpage, rdf-schema#domain, Topic
Business, type.domain.types, Shopping center
Musical Release, type.type.properties, Engineers
Business, type.domain.types, Board Member Title
Includes brands, rdf-schema#range, Brand
Brand, type.type.expected_by, Parent brand
Weblink, rdf-schema#domain, Topic
Product category, freebase.type_profile.strict_included_types, Topic
Business, type.domain.types, Market Index
Brand, common.topic.article, m.05czzt6
Brand, type.type.expected_by, Includes brands
Brand, type.type.properties, Owner(s)
m.09bx6d7, base.ontologies.ontology_instance_mapping.freebase_topic, Brand
Subjects, rdf-schema#range, Topic
Business, type.domain.types, Product Endorser
Brand, freebase.type_profile.strict_included_types, Abstract
Brand, type.property.reverse_property, Product lines
Consumer product, freebase.type_profile.strict_included_types, Topic
Currency, freebase.type_profile.strict_included_types, Topic
Brand, type.property.schema, Company-brand relationship
Products, rdf-schema#range, Consumer product
Musical Release, type.type.expected_by, Releases produced
Advertised  Brand, rdf-schema#domain, Ad Spot
Advertised  Brand, type.property.schema, Ad Spot
Employer, freebase.type_profile.published, Published
Business, freebase.domain_profile.featured_views, Competitive Space
Parent brand, type.property.schema, Brand
Business, type.domain.types, Oil Field
Brand, business.industry.companies, Jack Rogers Shoes Handbags
Business, freebase.domain_profile.featured_views, Venture Funded Company
Business, freebase.domain_profile.featured_topic, Kiva
Business, freebase.domain_profile.featured_views, Product Endorsee
Business, type.domain.types, Consumer product
Musical Release, type.type.properties, Region
Brand, common.topic.subject_of, Local Business Rockstar
Slogans, type.property.expected_type, Brand slogan
Brand, type.type.domain, Business
WeWantTraffic, base.web_design.web_design_company.website, WeWantTraffic
Brand, base.brand.glossary.definition, Branding
Business, freebase.domain_profile.expert_group, Business Experts
Brand, common.topic.webpage, m.09x_kw2
Business, type.domain.types, Stock listing
Business, type.domain.owners, Owners of business domain
Brand, freebase.equivalent_topic.equivalent_type, Brand
Business, type.domain.types, Sponsorship
Brand, business.industry.companies, Moving Brands
Brand, type.property.reverse_property, Products
Musical Release, type.type.properties, Release Date
brand, rdf-schema#range, Brand
Brand, business.industry.companies, AirSpace Studio
Topic, freebase.documented_object.documentation, m.0kpqw_
Business, type.domain.types, Shareholder
Abstract, type.type.domain, Type Ontology
Social media presence, rdf-schema#domain, Topic
Venture Funded Company, freebase.type_profile.published, Published
Business Operation, freebase.type_profile.kind, Definition
Adipex Dispensary, common.topic.notable_types, Business Operation
Musical Release, type.type.expected_by, releases_produced
Business, type.domain.types, Asset
Brand, base.brand.glossary.definition, Brand values
Business, type.domain.types, Venture Investment
Business, freebase.domain_profile.featured_views, Brand
Business, freebase.domain_profile.featured_views, Job title
Business, freebase.domain_profile.featured_views, Stock exchange
Business, type.domain.types, Employer
Business, type.domain.types, Exchange-operator relationship
Brand, type.type.properties, Colors
Business, type.domain.types, Stock exchange
GoWorx, common.topic.subjects, Brand
Venture Funded Company, freebase.type_hints.included_types, Topic
Brand, business.industry.companies, Imlek a.d.
Musical Release, type.type.properties, Track list
Brand, base.brand.glossary.definition, Brand architecture
Business, freebase.domain_profile.featured_views, Producer-product line relationship
Notable for, type.property.schema, Topic
Brand, common.topic.subjects, GoWorx
Vai Piano Reductions, Volume 1, common.topic.notable_for, g.1254xnvmx
Business, internet.website_category.sites, Nebulaworks
m.09w1jjx, common.webpage.topic, Brand
Owner(s), type.property.schema, Brand
Business, type.domain.types, Employment tenure
Shopping center, freebase.type_profile.strict_included_types, Topic
Brand, base.brand.glossary.definition, Brand valuation
Business, freebase.domain_profile.featured_views, Issue
Business, freebase.domain_profile.featured_views, m.05czzw5
Meta, freebase.type_kind.types, Topic
Brand, base.brand.glossary.definition, Brand strategy
m.09y415c, common.webpage.topic, Brand
Employer, type.type.domain, Business
Brand, business.industry.companies, Adipex Dispensary
Brand, type.type.expected_by, brand
Business, freebase.domain_profile.featured_views, Product category
Business, type.domain.types, Business Operation
Brands carried, type.property.expected_type, Brand
Slogans, type.property.reverse_property, Brand
Business, type.domain.types, Currency sub-unit
Includes brands, type.property.schema, Brand
Business, type.domain.types, Sponsor
Consumer product, freebase.type_profile.strict_included_types, Non-Agent
Employer, freebase.type_profile.strict_included_types, Topic
Brand, rdf-schema#domain, Guitar pickup
Business, freebase.equivalent_topic.equivalent_domain, Business
Subjects, type.property.schema, Topic
Brand, base.services.web_design_expertise.designers, WeWantTraffic
Business, type.domain.types, Product Endorsement
Brand, common.topic.article, m.01cdl
Industry, freebase.type_hints.included_types, Topic
Topic, freebase.type_profile.kind, Portrayal
Venture Funded Company, freebase.type_profile.strict_included_types, Employer
Parent brand, owl#inverseOf, Includes brands
Business, freebase.domain_profile.featured_views, m.05h9s6j
m.05czzt6, common.document.content, m.05czzsz
Products, rdf-schema#domain, Brand
Business, type.domain.types, Exchange operator
Brand, type.property.schema, Consumer product
Brands carried, rdf-schema#range, Brand
Business, freebase.domain_profile.featured_views, Sponsored Recipient
Consumer product, type.type.properties, Brand
Brand, common.topic.webpage, m.09w1lf0
Business, type.domain.types, Issue Type
Business, freebase.domain_profile.featured_views, Employer
Currency, freebase.type_hints.included_types, Topic
Consumer product, freebase.type_hints.included_types, Topic
Brand, common.topic.notable_types, Industry
Brand, type.type.properties, Products
Business, type.domain.types, Competitive space mediator
Product lines, type.property.expected_type, Product line
Topic, type.type.properties, Image
Official website, type.property.schema, Topic
Business, freebase.domain_profile.featured_views, Industry
Brand, rdf-schema#domain, Consumer product
Brands with this flavor, type.property.schema, Flavor
Brand, common.topic.notable_for, g.11b75p9k_c
Business, type.domain.types, Investment Round
Brand, type.type.properties, Slogans
mkbwerkplaats.nl, organization.organization.sectors, Brand
Colors, rdf-schema#domain, Brand
Topic equivalent webpage, type.property.schema, Topic
Brand, base.brand.glossary.definition, Co-branding
Business, freebase.domain_profile.equivalent_topic, Business
Business, type.domain.types, Product theme
Product lines, type.property.schema, Brand
Brand, common.topic.subject_of, mkbwerkplaats.nl
Brand, internet.website_category.sites, Nebulaworks
Brand, type.type.properties, Includes brands
WeWantTraffic, base.services.web_design_service.expertise, Brand
Consumer product, type.type.domain, Business
Brand, common.topic.subjects, ThinkHippo
Currency, type.type.domain, Business
Owner(s), rdf-schema#range, Company-brand relationship
Musical Release, type.type.properties, Release of
Brands with this flavor, type.property.expected_type, Brand
Notable types, rdf-schema#domain, Topic
Business, type.domain.types, Market size
Brand, type.property.expected_type, Brand
Owner(s), type.property.expected_type, Company-brand relationship
Official website, rdf-schema#domain, Topic
Brand, freebase.type_hints.included_types, Topic
Brands carried, rdf-schema#domain, Retailer
Brand, type.property.schema, Product line
Musical Release, type.type.properties, Catalog Number
m.09ybgp3, common.webpage.topic, Brand
Musical Release, freebase.type_profile.equivalent_topic, Release
Slogans, type.property.schema, Brand
Musical Release, type.type.properties, Label
Industry, freebase.type_profile.kind, Definition
Shopping center, freebase.type_profile.published, Published
Business, freebase.domain_profile.featured_views, Stem Cell Research Companies
Business, freebase.domain_profile.featured_views, Shareholder
Topic, type.type.properties, Notable types
m.09xr0ht, common.webpage.topic, Brand
Includes brands, rdf-schema#domain, Brand
Brand, type.property.schema, Competitive space mediator
Parent brand, type.property.reverse_property, Includes brands
Business, freebase.domain_profile.featured_views, Trade union
Brand, base.brand.glossary.definition, Brand Manager
Business, freebase.domain_profile.featured_views, m.07vr94g
Consumer product, freebase.type_profile.published, Published
Business, type.domain.types, Consumer company
Industry, freebase.type_profile.published, Published
Board Member Title, type.type.domain, Business
Also known as, rdf-schema#domain, Topic
Musical Release, freebase.type_profile.strict_included_types, Topic
Business, freebase.domain_profile.featured_views, Customer
Business, type.domain.types, Brand colors
Musical Release, freebase.type_profile.kind, Definition
Musical Release, freebase.type_hints.included_types, Topic
Business, freebase.domain_profile.featured_views, m.05c_00z
Brand, business.industry.companies, Speirs and Major Associates
Business, freebase.domain_profile.featured_views, Currency
Shopping center, freebase.type_hints.included_types, Topic
Parent brand, type.property.expected_type, Brand
Owner(s), rdf-schema#domain, Brand
Region, type.property.schema, Musical Release
Musical Release, type.type.expected_by, Releases
Business, type.domain.types, Sponsored Recipient
Includes brands, type.property.expected_type, Brand
Subjects, owl#inverseOf, Subject of
Brand, owl#inverseOf, Product lines
Industry, type.type.domain, Business
Adipex Dispensary, business.brand.includes_brands, Adipex Dispensary
Brand, business.industry.companies, Bambi a.d.
Business, freebase.domain_profile.featured_views, Sponsor
Business, type.domain.types, Product category
Business, type.domain.types, Industry
Currency, freebase.type_profile.kind, Definition
Consumer product, freebase.type_profile.kind, Meta
Products, type.property.master_property, Brand
Brand, type.type.properties, Product lines
Musical Release, type.type.expected_by, Releases engineered
Musical Release, type.type.properties, Producers
Business, type.domain.types, Advertising slogan
Board Member Title, freebase.type_profile.strict_included_types, Topic
Brand, common.topic.subject_of, GoWorx
m.0b45_vq, common.webpage.topic, Brand
Brand, type.property.master_property, Colors
Business, freebase.domain_profile.featured_views, m.05cz_gp
Product lines, rdf-schema#range, Product line
Colors, type.property.reverse_property, Brand
Business, type.domain.types, Competitive Space
Adipex Dispensary, business.business_operation.industry, Brand
Vai Piano Reductions, Volume 1, common.topic.notable_types, Musical Release
Brand, base.ontologies.ontology_instance.equivalent_instances, m.09bx6d7
Meta, freebase.type_kind.types, Consumer product
Business, type.domain.types, Issue
Business, type.domain.types, Trade union
Musical Release, freebase.type_profile.published, Published
Topic, type.type.properties, Notable for
Topic, type.type.properties, Topical webpage
Brand, type.type.properties, Parent brand
Topic, type.type.properties, Subjects
Musical Release, freebase.type_profile.strict_included_types, Non-Agent
Venture Funded Company, freebase.type_profile.strict_included_types, Business Operation
Business, type.domain.types, Brand slogan
Brand, common.topic.webpage, m.09xr0ht
Topic, freebase.type_profile.published, Published
Business, type.domain.types, Endorsed Product
Product category, freebase.type_hints.included_types, Topic
Business, freebase.domain_profile.category, General
Product lines, type.property.master_property, Brand
brand, rdf-schema#domain, Condiment
Business, freebase.domain_profile.category, Commons
Topic, freebase.type_profile.kind, Meta
Slogans, rdf-schema#domain, Brand
Brand, common.topic.webpage, m.09xpfsh
Colors, type.property.expected_type, Brand colors
Shopping center, freebase.type_profile.kind, Definition
Topic, type.type.domain, Common
Brand, business.industry.companies, Ziba Design
Musical Release, type.type.expected_by, primary_release
Topic, type.type.properties, Properties
Description, rdf-schema#domain, Topic
Brand, business.industry.companies, venturethree
Venture Funded Company, freebase.type_hints.included_types, Employer
Brand, type.property.master_property, Slogans
Industry, freebase.type_profile.strict_included_types, Topic
Job title, type.type.domain, Business
Slogans, rdf-schema#range, Brand slogan
Business, type.domain.types, Company-brand relationship
Business, freebase.documented_object.documentation, m.01xwjpj
Employer, freebase.type_hints.included_types, Topic
Brand, business.industry.companies, Pilotfish
Includes brands, type.property.master_property, Parent brand
Brand, common.topic.webpage, m.09w1jjx
Brand, business.industry.companies, Wolff Olins
Business, type.domain.types, Product line
Description, type.property.schema, Topic
Colors, type.property.schema, Brand
Brand, business.industry.companies, Interbrand
Business Operation, freebase.type_hints.included_types, Topic
Subjects, type.property.expected_type, Topic
Adipex Dispensary, business.brand.parent_brand, Adipex Dispensary
Brand, type.type.expected_by, Advertised  Brand
Venture Funded Company, freebase.type_hints.included_types, Business Operation
Brand, rdf-schema#domain, Company-brand relationship
Brand, rdf-schema#range, Brand
Products, type.property.schema, Brand
Topic, type.type.properties, Official website
Musical Release, type.type.expected_by, Primary release
Brand, type.property.schema, Brand colors
Brand, common.topic.webpage, m.09y415c
Brand, type.type.expected_by, Brands carried
Business, type.domain.types, Venture Funded Company
brand, type.property.expected_type, Brand
Brand, business.industry.companies, SMART
Topic, type.type.properties, Web Link(s)
Products, type.property.expected_type, Consumer product
Brand, base.brand.glossary.definition, Brand personality
Business, type.domain.types, Exchange rate
Brand, rdf-schema#domain, Brand colors
Brand, base.brand.glossary.definition, Brand identity
Business, type.domain.types, Asset Ownership
Owner(s), owl#inverseOf, Brand
Musical Release, common.topic.article, m.01z0msw
Brand, type.type.expected_by, Brand
Brand, business.industry.companies, Lancaster Italia
Business, freebase.domain_profile.featured_views, m.05czz86
Business, type.domain.types, Open Times
Business, type.domain.types, Market share
Brands with this flavor, rdf-schema#domain, Flavor
Social media presence, type.property.schema, Topic
Brand, business.industry.companies, Štark
Topic, type.type.properties, Subject of
Brand, organization.organization_sector.organizations_in_this_sector, Jack Rogers Shoes Handbags
Musical Release, type.type.properties, Running Time
Business, freebase.domain_profile.featured_views, Market Index
Brands with this flavor, rdf-schema#range, Brand
Business, type.domain.types, Job title
Business, type.domain.types, Venture Investor
Brand, freebase.type_profile.kind, Definition
Board Member Title, freebase.type_profile.kind, Definition
Business, freebase.domain_profile.featured_views, Investment Round
Topic, type.type.properties, Topic equivalent webpage
Brand, organization.organization_sector.organizations_in_this_sector, mkbwerkplaats.nl
Advertised  Brand, rdf-schema#range, Brand
Brand, freebase.type_profile.strict_included_types, Topic
Brand, rdf-schema#domain, Competitive space mediator
Brand, owl#inverseOf, Products
Brand, common.topic.webpage, m.09x4_r6
Musical Release, type.type.properties, Format
Image, type.property.schema, Topic
Brand, common.topic.subject_of, A Hundred Monkeys
Job title, freebase.type_profile.strict_included_types, Topic
m.09w1lf0, common.webpage.topic, Brand
Business, freebase.domain_profile.featured_views, Product Endorser
Brand, base.brand.glossary.definition, Brand experience
Musical Release, type.type.properties, Tracks
Business, type.domain.types, Brand
Local Business Rockstar, common.topic.subjects, Brand
Business, type.domain.types, Customer
Brand, business.industry.companies, Siegel + Gale
GoWorx, common.topic.subject_of, Brand
Business, freebase.domain_profile.featured_views, Issuer
m.09x_kw2, common.webpage.topic, Brand
Musical Release, freebase.documented_object.documentation, m.01z0msw
Business, type.domain.types, Asset Owner
Brand, base.brand.glossary.definition, Brand positioning
Brand, base.brand.glossary.definition, Brand management
Business, freebase.domain_profile.featured_views, Consumer company
Colors, owl#inverseOf, Brand
Business, type.domain.types, Holding
Advertised  Brand, type.property.expected_type, Brand

Answer: Ibanez