Parallel execution using multiple dependant Datasets

We should choose multiple datasets from multiple data templates, each execution should pick a set that is dependent on the other set.

ex : Data_template1, Data_template2,Data_tamplate3
Dataset1, Dataset2,Dataset3

execution1 ---> Data_template1 --> Dataset1, Data_template2 --> Dataset1,Data_template3 --> Dataset1

execution2 ---> Data_template1 --> Dataset2, Data_template2 --> Dataset2,Data_template3 --> Dataset2

execution2 ---> Data_template1 --> Dataset3, Data_template2 --> Dataset3,Data_template3 --> Dataset3

how to achieve this and execute a single TC with multiple dependant datasets.