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You'll have to troubleshoot what's going on. If it's the alternator, the battery is likely dead.
Beyond that, I'd look at the basics. There's a number of things that have to work for it to run. Any one of them could cause it to drop dead and fail to start. Do you have fuel and spark? If no spark or fuel injection pulse, it might be a crankshaft sensor.
I might be a good idea to find out why the car was parked. Perhaps you just discovered the reason. (Intermittent problem.)
Beyond that, I'd look at the basics. There's a number of things that have to work for it to run. Any one of them could cause it to drop dead and fail to start. Do you have fuel and spark? If no spark or fuel injection pulse, it might be a crankshaft sensor.
I might be a good idea to find out why the car was parked. Perhaps you just discovered the reason. (Intermittent problem.)
