If I succeed in obtaining the address from her, we can go there at once, taking Mrs. Vandemeyer with us if necessary.
We can go there using my car as soon as I get the address from Mrs. Vandemeyer. 
mnli hypothesis: We can go there using my car as soon as I get the address from Mrs. Vandemeyer.  premise: If I succeed in obtaining the address from her, we can go there at once, taking Mrs. Vandemeyer with us if necessary.