It's hard to be more impressive than Gina Bianchini. She has a stellar resume: her undergraduate and MBA degrees are from Stanford, she's worked at Goldman Sachs and she has launched multiple successful companies. But if anyone can measure up, it's her former co-founder Marc Andreessen — the billionaire and leading Silicon Valley venture capitalist whose Andreessen Horowitz portfolio includes billion-dollar companies like Airbnb, Facebook and Box.