Kuramoto model has analytic solution.

Question

I read a paper about a Kuramoto model, In this paper Kuramoto model has analytic solution of any initial value $\Theta(0)=(\theta_1(0),\theta_2(0),...,\theta_n(0))$

and the Kuramoto model is

$$\dot{\theta}_i(t)=\omega_i+\frac{K}{n}\sum_{j=1}^n \sin(\theta_j(t)-\theta_i(t))$$

Here $\omega_i=\dot{\theta_i}(0)$, and $K$ is an constant.

How can we verify this Kuramoto model has analytic solution.