Why is this std::map code not working?

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C++

after using typename for my iterator compiler couldn't recognise ->second.get. Why

           typename std::map<K,V>::iterator p;

            template<class K, class V>
           /////////////////////////////
           ////////////////////////////
p = mymap.find(Key);

if(p != mymap.end())
{
    if(p->second.get() == val)//Compiler couldn't //recoginise get hy
    {
        throw 'a';//Value type cannot match value for previous key
    }
}

What I have tried:

I have spent the whole day on google over.