Add spaces: LeoDelibes:Lakme.AlessandraRuffini,GiuseppeMorino,BrunoPratico,otherssingingalongwithItaly'sinternationalchoirandorchestrawillbedirectedbyCarlosPiantiniinarecordingfrom1991.

Answer: Leo Delibes: Lakme. Alessandra Ruffini, Giuseppe Morino, Bruno Pratico, others singing along with Italy's international choir and orchestra will be directed by Carlos Piantini in a recording from 1991.

Add spaces: Subsequently,thesegroupssolvedanumberofproblemsinconnectionwiththeenvironmentalmanagementsystem.

Answer: Subsequently, these groups solved a number of problems in connection with the environmental management system.

Add spaces: Whiletheywerelookingsteadfastlyintotheskyashewent,behold,twomenstoodbytheminwhiteclothing,

Answer:
While they were looking steadfastly into the sky as he went, behold, two men stood by them in white clothing,