Assertion: parabola | /r/HasProperty | ubiquitous
Facets:
Source sentences:
text: Though parabolas are ubiquitous, it is important to note that they're different from other U-shaped curves, such as a hanging chain (a catenary), the path of a child on a swing (a circular arc), the arc from an upright flashlight shining onto a wall (a hyperbola) or the crest of the side view of a spring (a sinusoid).