nested csv into tsv

[bioinfornatics]

dear, i have this data:
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data1	data2	data3a;data3b;data3c
cata1	cata2	cata3a;cata3b;cata3c
tata1	tata2	tata3a;tata3b;tata3c
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field are sepaated by tab but third field contain data separeted by semi
colon

I have try:
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import std.csv;
import std.string;
import std.stdio;

struct Data{
    public:
        string field1;
        string field2;

    @property void field3( string field ){
        _field3 = field.split(";");
    }
    @property string[] field3(  ){
        return _field3;
    }

    private:
        string[] _field3;
}

void main(){
    Data[] result;
    File f = File( "data.csv", "r" );
    foreach( char[] line; f.byLine() ){
        result ~= csvReader!Data(line, '\t').front;
    }
}
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This build fine but do not works at runtime

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$ ./test_csv 
std.csv.CSVException@/usr/include/d/std/csv.d(1047): Can't parse string:
"[" is missing
std.conv.ConvException@/usr/include/d/std/conv.d(2714): Can't parse
string: "[" is missing
std.conv.ConvException@/usr/include/d/std/conv.d(1597): Unexpected 'd'
when converting from type string to type string[]
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