id	keyword
cjfa-20692	heating
cjfa-20692	question
cjfa-20692	source
cjfa-20692	heating source
cjfa-20692	figure
cjfa-20692	elaboration
cjfa-20692	answers
cjfa-20692	people
cjfa-20692	furnace
cjfa-20692	place
cjfa-20692	pln
cjfa-20692	respondents