If the monitor L-2021 is either produced by LG and produced before 2010 or neither produced by LG nor produced before 2010,  then L-2021 is either in the library or produced by LG.
¬(ProducedBefore(l-2021, year2010) ⊕ ProducedBy(l-2021, lG)) → (In(l-2021, library) ⊕ ProducedBy(l-2021, lG))