Is there any proof for the following statement? It has been used as trivial fact in the one of papers of Edward Witten

Let $\Sigma$ be a compact connected Riemann surface as orbifold, with marked points $x_1,\cdots x_p$ of multiplicities $m_1,\cdots,m_p$ then is there always exists an elliptic surface $X$ with $\chi(X)>0$ over $\Sigma$, ($\pi:X\to \Sigma$) such that the general fibers are smooth elliptic curve and over the marked points $x_i$ one has multiple fibers $\pi^{-1}(x_i)$ of multiplicity $m_i$