Remember: the construction por lo que+verbo usually translates as 'from what...' or 'as far as...'.
-Sabes arreglártelas sola, por lo que veo — You know how to look after yourself, from what I can see
-Por lo que se ve, nadie lo conocía — From what I can tell, no one knew him
-Por lo que sé, hay pruebas — As far as I know, there is evidence
-Por lo que he leído en el periódico, parece un accidente bastante grave — From what I've read in the paper, it looks like a fairly serious accident
