Obstruction, who's call?

[Robert G]

I am PU, ground ball to F3 and as F1 is covering 1st he (accordingly to the other teams coach) obstucts B1 as my partner calls him(B1) out. The coach appeals to me about the obstruction( which I clearly did not see) And I ask my partner what he has?
My question is who makes the obstuction call? I had thought that I am watching for a lane interference, & that if my partner wants my advice on appeal he would ask me not the other way around

[Edited by Robert G on Apr 29th, 2001 at 08:30 AM]