Methanation
https://openalex.org/C123703457
https://www.wikidata.org/wiki/Q905071
Power to gas
https://openalex.org/C14518398
https://www.wikidata.org/wiki/Q12646543
Electrolysis
https://openalex.org/C163127949
https://www.wikidata.org/wiki/Q64403
Polymer electrolyte membrane electrolysis
https://openalex.org/C100729193
https://www.wikidata.org/wiki/Q17105319
Process engineering
https://openalex.org/C21880701
https://www.wikidata.org/wiki/Q2144042
High-temperature electrolysis
https://openalex.org/C114506045
https://www.wikidata.org/wiki/Q1408813
Renewable energy
https://openalex.org/C188573790
https://www.wikidata.org/wiki/Q12705
Electrolysis of water
https://openalex.org/C48256821
https://www.wikidata.org/wiki/Q903456
Environmental science
https://openalex.org/C39432304
https://www.wikidata.org/wiki/Q188847
Waste management
https://openalex.org/C548081761
https://www.wikidata.org/wiki/Q180388
Chemistry
https://openalex.org/C185592680
https://www.wikidata.org/wiki/Q2329
Referring back to the research aims or procedures
The responses relating to X were subjective and were therefore susceptible to recall bias.
[INST] Please produce a sentence from the paper. The sentence should not mention the title of the paper, rather it be extracted from the Reporting Results section of the paper.
Please provide one singular full sentence from the paper that serves the function provided, using the example as guidance. Be specific, using relevant terminology from the paper.
Refrain from vague or generic statements. Finally produce a search query in the form of a question targeted towards the knowledge contained therein. 
You must output json with the structure of {'Sentence': sentence, 'Query': query}.
Field: "Process engineering".
Paper: "Renewable Power-to-Gas: A technological and economic review"
Function: "Referring back to the research aims or procedures".
Example Sentence: "The responses relating to X were subjective and were therefore susceptible to recall bias.". [/INST]