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: what is the radio program episode of open circuit? 
Knowledge Triplets: m.05v0wkw, award.award_honor.year, 1979
m.05v0wkw, award.award_honor.notes_description, The Longest Journey
Canadian Broadcasting Corporation, award.award_winner.awards_won, m.05v0wkw
The Longest Journey, radio.radio_program_episode.subjects, Pregnancy
The Longest Journey, radio.radio_program_episode.subjects, Childbirth
needs_approval, user.zsi_editorial.editorial.tag.comments, ZSI on Open Circuit
Open Circuit, award.award_winning_work.awards_won, m.05v0wkw
Open Circuit, radio.radio_program.episodes, The Longest Journey
ZSI, user.zsi_editorial.editorial.editor.comments, ZSI on Open Circuit
Peabody Award, award.award_category.winners, m.05v0wkw
ZSI on Open Circuit, user.zsi_editorial.editorial.comment.editorial_tags, needs_approval
ZSI on Open Circuit, user.zsi_editorial.editorial.comment.target, Open Circuit
The Longest Journey, radio.radio_program_episode.program, Open Circuit
Childbirth, radio.radio_subject.episodes_with_this_subject, The Longest Journey
ZSI on Open Circuit, type.object.permission, m.03mk2pl
ZSI on Open Circuit, user.zsi_editorial.editorial.comment.editor, ZSI
initial_review, user.zsi_editorial.editorial.tag.comments, ZSI on Open Circuit
m.05v0wkw, award.award_honor.ceremony, 1980 Peabody Awards Ceremony
m.05v0wkw, award.award_honor.award, Peabody Award
1980 Peabody Awards Ceremony, award.award_ceremony.awards_presented, m.05v0wkw
Pregnancy, radio.radio_subject.episodes_with_this_subject, The Longest Journey
m.03mk2pl, type.permission.controls, ZSI on Open Circuit
m.05v0wkw, award.award_honor.honored_for, Open Circuit
Open Circuit, user.zsi_editorial.editorial.topic.comments, ZSI on Open Circuit
The Longest Journey, radio.radio_program_episode.air_date, 1979-10-07
ZSI on Open Circuit, user.zsi_editorial.editorial.comment.editorial_tags, initial_review
m.05v0wkw, award.award_honor.award_winner, Canadian Broadcasting Corporation

Answer: The Longest Journey