@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:_polynomial_	skos:broader	isac:nonlinear_function_ .
isac:_constant_	skos:broader	isac:nonlinear_function_ .
isac:_income_	skos:broader	isac:nonlinear_function_ .
isac:_exponential_	skos:broader	isac:nonlinear_function_ .
isac:square_root_	skos:broader	isac:nonlinear_function_ .
isac:_logarithm_	skos:broader	isac:nonlinear_function_ .
isac:sigmoid_function_	skos:broader	isac:nonlinear_function_ .