Complex sentence: The association with N49 can only be indirect: it seems clear that soft gamma repeaters form in young stellar clusters, it is not certain that the explosion that gave birth to SGR 0525-66 is also the one that produced the remnant N49.
Split into simpler sentences: The association with N49 can only be indirect: it seems clear that soft gamma repeaters form in young stellar clusters. It is not certain that the explosion that gave birth to SGR 0525-66 is also the one that produced the remnant N49.