Uncle Teddy ! ''<br>Rob scampered down the avenue as fast as his short legs would carry him .<br>All he boys but Dan ran after him to see who should be first to open the gate , and in a moment the carriage drove up with boys swarming all over it , while Uncle Teddy sat laughing in the midst , with his little daughter on his knee .
Uncle Teddy has more than one child.
Uncle Teddy has at least one child based on the context because it mentions he has "his little daughter on his knee." Rob is implied to be the one calling him "Uncle Teddy" so he is presumably a nephew and the other boys mentioned aren't shown to be directly related to Uncle Teddy at all here. Therefore, it's not for sure correct nor incorrect to state Uncle Teddy has more than one child because it can't be determined for sure from the context. I think the system may have had trouble with this statement because there are multiple children mentioned in the passage, despite only one being directly stated to be a child of Uncle Teddy.
( z1 have-rel-role :ARG0 ( z2 person :quant ( z3 more-than :op 1 ) ) :ARG1 ( z4 person :name ( z5 name :op "Teddy" ) :ARG0-of ( z6 have-rel-role :ARG2 ( z7 uncle ) ) ) :ARG2 ( z8 child ) )