Determining if the subset of two vectors is a subspace in $\mathbb{R}^3$

Question

Is the set containing $\{\mathbf{w_1},\mathbf{w_2}\}$ made of only two vectors $\mathbf{w_1}=(1,0,-5)$ and $\mathbf{w_2}=(2,3,4)$ a subspace in $\mathbb{R}^3$? I don't know what to do about the fact that two vectors with no condition are given. I'm pretty sure I'm overcomplicating this big time.