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 type of online advertising is extended by the same type? 
Knowledge Triplets: Online Advertising, type.type.extends, SEO Expert
SEO Expert, type.type.extends, SEO consultant
m.04j5wr7, type.permission.controls, Employer
Whynotad Web 2.0 Free On-Line Advertising, type.domain.types, Topic
m.04j5wr7, type.permission.controls, Whynotad Experts
SEO Expert, people.profession.people_with_this_profession, Stefano Natale
Internet, type.object.permission, m.04j5wr7
http://thatsnews.blogspot.com/2008/01/craigslist-and-kijiji-has-web-20.html, type.object.permission, m.04j5wr7
m.04mpmh3, type.object.permission, m.04j5wr7
m.04j5wr7, type.permission.controls, Online Advertising
Company, type.type.domain, Whynotad Web 2.0 Free On-Line Advertising
Whynotad Web 2.0 Free On-Line Advertising, type.object.permission, m.04j5wr7
m.04mpmgm, type.object.permission, m.04j5wr7
m.04j5wr7, type.permission.controls, Owners of whynotad domain
Web 2.0 Portal, type.type.domain, Whynotad Web 2.0 Free On-Line Advertising
SEO Expert, type.type.extends, Marketing Specialist
m.04j5wr7, type.permission.controls, m.04mpmgm
m.04j5wr7, type.permission.controls, m.04mpmgw
Whynotad Experts, type.object.permission, m.04j5wr7
Whynotad Web 2.0 Free On-Line Advertising, type.domain.types, Website
SEO Expert, type.type.extends, Online Advertising
m.04j5wr7, type.permission.controls, http://thatsnews.blogspot.com/2008/01/craigslist-and-kijiji-has-web-20.html
Joel Glenn Wright, people.person.profession, SEO Expert
Website, type.object.permission, m.04j5wr7
Topic, type.object.permission, m.04j5wr7
SEO Expert, people.profession.people_with_this_profession, Joel Glenn Wright
m.04mpmgc, type.object.permission, m.04j5wr7
m.04mpmgw, type.object.permission, m.04j5wr7
m.04ntqvh, type.object.permission, m.04j5wr7
m.04j5wr7, type.permission.controls, Website
Whynotad Web 2.0 Free On-Line Advertising, type.domain.types, Web 2.0 Portal
Whynotad Web 2.0 Free On-Line Advertising, type.domain.owners, Owners of whynotad domain
m.04j5wr7, type.permission.controls, Company
m.04j5wr7, type.permission.controls, All topics
m.04j5wr7, type.permission.controls, Internet
Whynotad Web 2.0 Free On-Line Advertising, type.domain.types, Employer
Website, type.type.domain, Whynotad Web 2.0 Free On-Line Advertising
SEO Expert, type.type.extends, SEO
All topics, type.object.permission, m.04j5wr7
SEO Expert, type.type.domain, Joel Glenn Wright
Employer, type.type.domain, Whynotad Web 2.0 Free On-Line Advertising
SEO Expert, type.object.permission, m.011tfyf_
Whynotad Web 2.0 Free On-Line Advertising, type.domain.types, Internet
Online Advertising, type.type.domain, Whynotad Web 2.0 Free On-Line Advertising
Whynotad Web 2.0 Free On-Line Advertising, type.domain.types, Web 2.0
m.04j5wrz, type.object.permission, m.04j5wr7
m.04j5wr7, type.permission.controls, m.04j5wrz
m.04j5wr7, type.permission.controls, Web 2.0 Portal
Internet, type.type.domain, Whynotad Web 2.0 Free On-Line Advertising
m.04j5wr7, type.permission.controls, Whynotad Web 2.0 Free On-Line Advertising
Topic, type.type.domain, Whynotad Web 2.0 Free On-Line Advertising
Whynotad Web 2.0 Free On-Line Advertising, type.domain.types, Company
m.03k, type.permission.controls, m.04j5wr7
Joel Glenn Wright, type.domain.types, SEO Expert
Web 2.0 Portal, type.object.permission, m.04j5wr7
Stefano Natale, people.person.profession, SEO Expert
http://www.allthingsweb2.com/mtree/CLASSIFIEDS_2.0/whynotad_web_2.0_classified_wiki/details/, type.object.permission, m.04j5wr7
Employer, type.object.permission, m.04j5wr7
Web 2.0, type.type.domain, Whynotad Web 2.0 Free On-Line Advertising
m.011tfyf_, type.permission.controls, SEO Expert
Web 2.0, type.object.permission, m.04j5wr7
m.04j5wr7, type.permission.controls, http://www.allthingsweb2.com/mtree/CLASSIFIEDS_2.0/whynotad_web_2.0_classified_wiki/details/
m.04j5wr7, type.permission.controls, Web 2.0
Company, type.object.permission, m.04j5wr7
Owners of whynotad domain, type.object.permission, m.04j5wr7
m.04j5wr7, type.permission.controls, m.04mpmgc
m.04j5wr7, type.object.permission, m.03k
m.04j5wr7, type.permission.controls, Topic
Online Advertising, type.object.permission, m.04j5wr7
m.04j5wr7, type.permission.controls, m.04ntqvh
m.04j5wr7, type.permission.controls, m.04mpmh3
Whynotad Web 2.0 Free On-Line Advertising, type.domain.types, Online Advertising

Answer: SEO
SEO consultant
Marketing Specialist