The agenda of the Security Council is an important issue related to national security and defense.

He claims to have seen an unidentified flying object.

This equation has homogeneity.

Solving a linear equation is difficult.

Keijiro is my best friend.

Sennenji is my best friend.

He always sticks his nose into other people's business like a busybody.

He was affected by secondary effects.

He enjoys derivative works of anime.

Saburo is my best friend.