Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.

[Q]: Question: What structure does methane have? Answer: three dimensional tetrahedra
[A]: Methane has a three-dimensional, tetrahedral structure.

[Q]: Question: What type of shape does a pelvic inlet have? Answer: oval shape
[A]: Pelvic inlet has a round or oval shape.

[Q]: Question: Solids can be divided into amorphous solids and which other group? Answer: crystalline solids
[A]:
Solids can be divided into amorphous solids and crystalline solids.