A matroidal generalization of results of Drisko and Chappell
  Let $M$ and $N$ be two matroids on the same ground set. We generalize results of Drisko and Chapell by showing that any $2n-1$ sets of size $n$ in $M \cap N$ have a rainbow set of size $n$ in $M \cap N$. 
Daniel Kotlar, Ran Ziv
math.CO